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Pitching position

In baseball, the pitching position refers to one of the two legal stances a pitcher must adopt on the mound when delivering the ball to the batter: the windup position or the set position, also known as the stretch. These positions are governed by official rules to standardize delivery mechanics, prevent deceptive motions, and maintain game integrity, with either allowable at any time regardless of base runners.^[1]^[2]^[3] The windup position begins with the pitcher's pivot foot on the pitching rubber and both shoulders facing the batter to some degree, while the free foot starts in contact with the ground and may step backward before a forward stride. This setup enables a full rocking motion—often involving a leg lift and arm wind-up—to build momentum, and it permits disengagement from the rubber for pickoff attempts by stepping backward with the pivot foot. Pitchers frequently use the windup with empty bases to optimize power generation, as the extended motion allows for greater stride length and leverage from the back leg.^[1]^[3] By contrast, the set position requires the pivot foot on the rubber, the free foot forward, and both hands holding the ball in front of the body, with the pitcher coming to a complete and natural stop before any motion toward the batter. The delivery emphasizes a compact stance to enable rapid throws to occupied bases. This position is standard with runners on base to minimize steal opportunities through a quicker release time, and variations like the slide step can further accelerate the motion without altering legality.^[2]^[3] Biomechanical analyses reveal subtle differences between the positions, with the windup yielding marginally higher ball velocities—particularly at the collegiate level—but these gains are clinically insignificant (under 0.5 m/s) and do not extend to professional or high school pitchers. Both positions produce comparable joint torques, angular velocities, and overall stress on the arm and shoulder, indicating similar injury risks and allowing pitchers to select based on situational needs or personal comfort rather than substantial performance trade-offs.^[4]

Legal Definitions

Windup Position

The windup position serves as the traditional full-motion starting stance for a baseball pitcher, primarily used when the bases are empty to maximize velocity and deception in the delivery. In this stance, the pitcher stands facing the batter with the pivot foot firmly in contact with the pitcher's plate and the free foot positioned free on the ground, typically slightly behind or adjacent to the plate with both feet parallel to the rubber's front edge. The hands are held together in front of the body, above the waist, while the shoulders face the batter to some degree, often with the pitcher's body aligned toward the third base line (for a right-handed pitcher) to support the rotational motion. This setup ensures stability and allows for a complete preparatory windup without violating engagement rules.^[1]^[5] The initial motion from the windup begins with a slight step backward using the free foot—no more than one step—to load balance and initiate momentum, keeping the pivot foot in contact with the rubber throughout. The hands, initially together, then separate as the pitcher begins the delivery, with the ball hand moving backward and upward in a full arm circle to generate power before coming forward toward the plate. This step-by-step progression commits the pitcher to a continuous delivery without interruption, distinguishing it as a deliberate, extended preparation compared to other stances.^[6]^[7] Historically, the windup functioned as the original legal pitching position in baseball's early rules, serving as the standard delivery method.^[8] Visual Alignment of Windup Stance (Right-Handed Pitcher):

Pivot Foot: Directly on the rubber, heel against the back edge.
Free Foot: Parallel to pivot foot, 4-6 inches behind or beside the rubber.
Body Orientation: Shoulders square to batter, torso slightly turned toward third base line.
Hands: Clasped at chest level, elbows relaxed.^[9]

In contrast to the set position, which enables quicker deliveries with runners on base, the windup emphasizes a complete, unhurried motion for optimal pitch effectiveness on empty bases.^[2]

Set Position

The set position, also known as the stretch position, is a compact pitching stance primarily employed when runners are on base, allowing the pitcher to maintain readiness for potential pickoff attempts while preparing to deliver the ball to the batter. In this position, the pitcher stands facing the batter with the pivot foot in contact with the pitcher's plate (rubber), the free foot positioned in front and parallel to the plate, and both hands together holding the ball in front of the body, typically at chest or waist level. This setup ensures the pitcher's body is oriented toward home plate, facilitating quick transitions between pitching and fielding motions.^[10] A key requirement of the set position is that the pitcher must come to a complete and discernible stop after assuming the stance and before beginning the delivery motion, particularly with runners on base, to prevent deception and ensure fairness in the game. This stop allows the catcher to relay signals clearly and gives baserunners a fair opportunity to observe the pitcher's intentions. Failure to achieve this complete stop constitutes a balk, advancing all runners. With no runners on base, the stop is not strictly enforced, though umpires may call an illegal pitch if the motion appears deceptive.^[2] Variations within the set position include the stretch, which serves as a preliminary motion where the pitcher extends the arms naturally before joining the hands and stopping, all in one continuous action without interruption. Another common variation is the slide step, where the pitcher shortens the leg lift and steps directly toward home plate more quickly than in a standard set delivery, aiming to reduce the time for baserunners to advance while maintaining velocity and control. These adaptations enhance the pitcher's ability to hold runners close to the bases.^[11]^[7] Official rules mandate that the pitcher receive signals from the catcher while remaining in contact with the pitcher's plate during the set position, ensuring clear communication of pitch selection before any commitment to delivery. Additionally, the pitcher may not feint a throw to a base without first disengaging the rubber by stepping backward off it with the pivot foot, as such actions from the set position would otherwise result in a balk. Unlike the windup position, which involves a more deliberate leg lift for generating power in empty-base scenarios, the set position prioritizes compactness and alertness over maximum momentum buildup.

Mechanics and Technique

Balance and Motion

In baseball pitching, maintaining balance begins with proper weight transfer from the pivot (back) leg to the stride (front) leg during the transition from the initial position to foot contact, which generates forward momentum while preserving equilibrium.^[12] This transfer is initiated by pushing off the rubber with the pivot leg, shifting the center of mass linearly toward home plate to maximize energy efficiency.^[12] Hip-lead initiation follows, where the pelvis rotates toward the target (approximately 35°) ahead of the shoulders, establishing separation in the kinetic chain to drive rotational power without compromising stability.^[12] Avoiding over-rotation is critical, as excessive pelvic or trunk twisting disrupts this separation and reduces control; pitchers must rely on core strength and flexibility to sequence rotations properly.^[12] The motion sequence commences with the leg lift in the wind-up or set position, raising the lead knee to about 90° at the balance point, where weight shifts primarily to the pivot leg for stability.^[13] From this point, the stride phase propels the lead leg forward, achieving a length typically 80-90% of the pitcher's height—measured from the pivot ankle to the lead ankle at landing—to optimize velocity and accuracy.^[14] Landing mechanics emphasize stability, with the lead foot contacting the ground slightly closed (4 to 14 inches closed, with toes pointing inward) and the knee flexed around 45°, creating a firm base that absorbs impact and facilitates subsequent rotations.^[12] Common faults in this phase include rushing the motion from the balance point, which often results from dropping the lead knee prematurely and leads to an open foot contact, short stride, and loss of control over pitch location.^[15] This rushing disrupts energy transfer, causing balls to sail high or wide; corrective techniques involve drills to maintain knee height during the lift and controlled timing in the stride, such as pause-and-go exercises to build rhythm.^[15] Another frequent issue is inadequate hip control during weight transfer, restricting rotation and forcing compensatory upper-body actions; strengthening the gluteal muscles and improving hip range of motion through targeted mobility work can address this.^[15] At its core, the physics of balance and motion in pitching relies on the conservation of angular momentum within the kinetic chain, where rotational energy generated from the lower body—starting with hip rotation—is sequentially transferred upward to the trunk and arm, amplifying ball speed while minimizing joint stress.^[16] This principle ensures that the initial torque from the legs and hips is preserved and amplified through proximal-to-distal sequencing, as deviations like poor weight transfer dissipate momentum prematurely.^[13]

Arm and Body Coordination

In baseball pitching, arm and body coordination synchronizes the upper extremities with trunk rotation to transfer kinetic energy efficiently from the lower body to the ball, maximizing velocity while minimizing joint stress. This integration occurs primarily during the cocking and acceleration phases, where the arm achieves optimal positioning relative to the rotating torso. The arm path differs notably between the windup and set positions to accommodate varying game situations. In the windup, the throwing arm follows a full extension overhead trajectory during the initial leg lift and stride, enabling maximal shoulder external rotation of 150-180 degrees in the late cocking phase for greater power generation.^[13] Conversely, in the set position, the arm path is abbreviated, initiating from a lower, more compact position without the overhead hand break to allow quicker setup and reduce motion variability with baserunners present.^[17] At ball release, forearm pronation—reaching approximately 90 degrees—facilitates grip release, enabling precise ball spin and trajectory control through coordinated supination adjustments.^[13]^[18] Trunk rotation is essential for torque production, with the shoulders leading the hips by 30-55 degrees of separation at stride foot contact, creating a stretch-shortening cycle that amplifies rotational velocity.^[19] This separation generates substantial kinetic energy, where peak transverse trunk rotational velocity correlates strongly with ball speed, explaining up to 69% of velocity variability through core contributions estimated at 50-80% of total power.^[20]^[21] Maintaining a consistent release point, typically at a height of about 6 feet for MLB pitchers, ensures command and deception.^[22] Arm extension during this phase—often 6-7 feet forward from the rubber—further enhances effectiveness by shortening the distance to the plate, boosting perceived velocity by 1-2 mph without altering actual release speed.^[23]^[24] To develop this coordination, pitchers employ targeted drills like the towel drill, where a lightweight towel replaces the ball to emphasize arm lag behind trunk rotation, refining timing and reducing compensatory movements during the acceleration phase.^[25]

Historical Development

Origins in Early Baseball

In the nascent stages of organized baseball before 1845, pitching was an informal act derived from earlier bat-and-ball games like rounders, with no codified positions or deliveries; pitchers typically lobbed the ball underhand from an unmarked spot roughly 45 feet from home base to facilitate hitting rather than challenge batters.^[26] This underhand style emphasized a gentle toss with a stiff arm, reflecting the game's social and recreational roots among amateur clubs in the northeastern United States.^[27] The formalization of pitching positions began with the Knickerbocker Rules of 1845, drafted by Alexander Cartwright, which required the pitcher to stand on a straight line 45 feet from home plate, delivering underhand with both feet on the ground and the arm parallel to the body.^[28] This setup confined the pitcher to a simple stance without a defined box, prioritizing fairness and hittable pitches over velocity or deception. By the 1860s, rules evolved to include a pitcher's box—initially a 12-by-3-foot area in 1863—to restrict movement and prevent running starts, maintaining the underhand requirement while gradually allowing elbow bends in 1872 for subtle wrist snaps.^[29]^[28] The National League, founded in 1876 as the first major professional circuit, introduced more structured stance rules in the late 1870s, adopting a 4-by-6-foot pitcher's box by 1879 with the front edge at 45 feet from home, and mandating the hand remain below the waist to curb aggressive motions.^[28]^[30] These regulations built on amateur precedents but enforced them rigorously in professional play, where pitchers like Candy Cummings experimented with delivery innovations; Cummings, credited with inventing the curveball in 1867 while on an amateur Brooklyn team, twisted his wrist underhand to impart spin, sparking widespread motion experimentation that tested rule boundaries.^[31]^[32] Professionals, facing competitive pressures, adopted such variations faster than amateurs, who adhered longer to traditional underhand lobs in club games to uphold the sport's gentlemanly ethos.^[33] By the early 1880s, pitchers increasingly violated underhand restrictions, leading to the legalization of overhand delivery in 1884 and paving the way for the windup's standardization.^[28]

Evolution in Modern Rules

In the early 20th century, baseball rules governing pitching positions evolved to balance offensive opportunities with defensive control, particularly as the game shifted toward higher scoring in the live-ball era. A key change in 1920 updated the balk rule (Rule 34, Section 12), making the ball dead upon a balk call and allowing all runners to advance one base if the balk occurred with bases occupied; this reinforced the mandate for pitchers to use the set position when runners were on base, while permitting the full windup only with the bases empty to minimize deception and facilitate quicker pickoff attempts.^[34] The 1950s saw further refinements to curb deceptive practices from the set position, driven by umpires' observations of pitchers feinting motions to unsettle runners. In 1950, the rules governing the set position (Rule 2.61) were amended to require a "complete stop of at least one second" before delivery from the set position with runners on base, replacing the previous vague requirement for merely "a stop," thereby standardizing enforcement and promoting strategic clarity in holding runners.^[35] This adjustment aimed to accelerate gameplay by reducing prolonged stalling while preserving the set position's role in pickoff plays. The 21st century brought technology and data-driven changes to enhance pace of play, with the 2023 introduction of the pitch clock significantly impacting set position usage. Under Rule 5.07(c), pitchers must begin their delivery within 20 seconds with runners on base (15 seconds with bases empty), limiting holds in the set position and integrating with balk penalties for violations; this rule, implemented league-wide, reduced average game time by about 30 minutes and altered strategies by discouraging extended runner monitoring.^[36]

Rules and Variations

Official Regulations

In Major League Baseball (MLB), the official regulations for pitching positions are governed by Rule 5.07(a), which stipulates that there are two legal pitching deliveries: the windup position and the set position, either of which may be used at any time during the game.^[37] The windup position requires the pitcher to stand facing the batter with the pivot foot in contact with the pitcher's plate and the other foot free, allowing natural movement associated with the pitch, while the set position mandates the pivot foot in contact with the plate, the other foot in front, and the hands together holding the ball in front of the body, coming to a complete and discernible stop, and holding that position for at least one second before delivering the pitch.^[37] Any delivery not conforming to these positions, such as an undeclared hybrid motion that blends elements of both without proper adherence, is considered illegal and may result in a balk if runners are on base.^[3] A balk is defined under Rule 6.02(a) as an illegal act by the pitcher with a runner or runners on base, intended to deceive the runner(s), including motions from the set position that do not complete the pitch or a play, such as stepping off the rubber without first disengaging by clearly moving the pivot foot backward off the plate.^[37] Examples include failing to come to a complete stop in the set position before delivering the pitch (6.02(a)(13)), making a motion naturally associated with the pitch without delivering it (6.02(a)(1)), or dropping the ball while touching the plate (6.02(a)(10)).^[37] The penalty for a balk is that the ball is dead, and each runner advances one base; if the batter and all runners safely reach the bases they would have under a legal pitch, the balk is nullified and play continues.^[37] With bases unoccupied, such illegal actions constitute an illegal pitch, resulting in a ball being awarded to the batter (Rule 6.02(b)).^[37] Umpires enforce these regulations by closely monitoring the pitcher's motions from their positions, particularly the home plate umpire and base umpires who signal a balk by pointing toward the pitcher while verbally calling "Balk!" to alert all participants.^[38] Enforcement includes immediate calling of the balk to nullify any subsequent play, with the ball becoming dead upon the call.^[37] Close calls, such as disputed disengagements or stops, may be subject to replay review if a manager challenges the call within the allowable time or if initiated by the crew chief, allowing video evidence to confirm or overturn the ruling under MLB's Replay Review Regulations.^[39] In youth and amateur leagues, such as Little League Baseball for players aged 12 and under, regulations differ to prioritize safety and development; for instance, pitchers in Majors and below divisions are not required to come to a complete stop in the set position, and they may initiate a windup motion directly from the set position without penalty, reducing complexity and potential strain compared to MLB standards. These adaptations stem from historical rule evolutions aimed at minimizing injury risks in younger athletes.

Pitch Clock and Timing Constraints

In 2023, Major League Baseball (MLB) implemented the pitch clock as a key measure to accelerate game pace, mandating that pitchers begin their delivery within 15 seconds when the bases are empty or 20 seconds with runners on base from the set position; this was adjusted in 2024 to 18 seconds with runners on base. The timer activates once the pitcher possesses the ball on the mound and the batter is in the batter's box, halting only when the pitcher initiates motion toward home plate, applicable to both windup and set deliveries. This rule builds on prior minor league testing and aims to minimize downtime without altering core gameplay elements.^[40] The pitch clock profoundly influences pitching motions by curtailing extended holds in the set position, where pitchers traditionally paused to deter base runners through prolonged stances or repeated pickoff attempts. With the timer running continuously unless reset by a disengagement (limited to two per plate appearance), pitchers must expedite transitions to delivery, reducing opportunities for strategic delays and fostering more fluid set-to-pitch sequences. In the windup position with empty bases, the stricter 15-second limit similarly compels quicker initiations of the full motion, streamlining overall delivery timing to comply with the constraints. The 2024 reduction to 18 seconds with runners further tightened pacing, contributing to sustained shorter game times.^[41]^[40] Violations occur if the pitcher fails to start delivery before the timer expires, resulting in an automatic ball awarded to the batter, which disrupts strategy by penalizing hesitation and incentivizing proactive pacing over conservative runner control. This enforcement heightens the stakes for pitchers, as repeated infractions can shift pitch counts unfavorably, prompting adjustments in how they balance pickoff risks with timely deliveries. The rule briefly intersects with balk regulations, where time-pressured motions may inadvertently trigger balk calls if not executed properly.^[40] Adoption of the pitch clock extends globally, notably in Minor League Baseball (MiLB) starting in 2021 across levels like Triple-A, Double-A, and select Low-A affiliates as an experimental pace-of-play initiative. Implementation there yielded games averaging 20-25 minutes shorter, with nine-inning contests dropping significantly from prior three-hour norms through enforced timers between pitches, innings, and changes. In MLB's 2023 debut season, the rule contributed to a 24-minute reduction in average game length to 2 hours and 40 minutes, with further adjustments maintaining times around 2 hours and 38 minutes as of 2025, validating its efficacy in shortening play while maintaining competitive integrity.^[42]^[43]^[44]

Advantages and Disadvantages

Strategic Benefits

The windup position provides pitchers with a more fluid and complete kinetic chain, enabling greater momentum generation and a natural rhythm that enhances overall command and strikeout efficiency. This setup is particularly beneficial for power pitches when the bases are empty, as it allows pitchers to load their legs more effectively for maximum force transfer. Biomechanical studies indicate that fastball velocity can be slightly higher in the windup compared to the set position among collegiate pitchers, though the difference is minimal (less than 1.1 mph) and not significant at the professional level.^[45] In contrast, the set position—also known as the stretch—offers key defensive advantages when runners are on base, primarily through improved pickoff opportunities and a shortened delivery. Elite pitchers can catch approximately 5-6% of baserunners via pickoffs from the set, as demonstrated by Julio Urias's 5.7% rate (pickoffs per baserunner) in 2016, which helps disrupt baserunners and limit their leads. Additionally, the set position facilitates quicker delivery times to the plate compared to the windup, giving catchers more time to throw out potential stealers.^[46]^[45] Strategically, pitchers alternate between positions based on game situations to optimize control and deception: the windup for unleashing high-velocity strikes in empty-base scenarios to rack up strikeouts, and the set for maintaining runner containment during high-pressure at-bats. This situational deployment reduces stolen base success rates by complicating runners' timing, with the set position's expedited motion recommended specifically to prevent advances.^[45]^[47]

Potential Risks and Limitations

The windup position, characterized by its longer preparatory motion, exposes pitchers to heightened vulnerability against base stealers, as it limits quick disengagements or pickoff attempts compared to the set position. This extended delivery can facilitate successful steals, particularly at second base, since the pitcher must commit to the full motion once initiated, reducing the ability to hold runners close to the bases.^[7] Additionally, interruptions or hesitations in the windup with runners on base carry a risk of balk calls, as the motion must proceed without deception or pause to avoid advancing runners.^[48] In contrast, the set position (also known as the stretch) imposes performance limitations, including a potential minor reduction in pitch velocity for some pitchers due to the abbreviated stride and momentum buildup. Biomechanical analyses indicate that fastball speeds are generally comparable between positions, with differences typically under 0.5 m/s (about 1 mph) and below clinical significance, though individual variations may result in slightly lower velocities from the set.^[4] The constrained mechanics of the set align closely with the windup in terms of joint stress.^[47] Regarding injury correlations, studies on elbow valgus torque and joint loads show no clinically meaningful differences in stress between the windup and set positions, suggesting comparable risks for issues like ulnar collateral ligament (UCL) tears. While overall pitching workload and velocity remain primary factors in elbow injuries, the set position does not independently elevate risk beyond that of the windup, as kinematics and kinetics align closely across deliveries.^[4] To mitigate these risks, pitchers often incorporate hybrid training regimens that blend elements of both positions, fostering adaptable mechanics and reducing overuse of a single delivery style. Such programs emphasize balanced practice between windup and set to distribute physical demands, alongside strength conditioning for the lower body and core to support consistent velocity and minimize strain accumulation.^[49]

Impact on the Game

Influence on Pitching Strategies

In baseball, the choice between the windup and stretch pitching positions significantly influences strategies involving base runners, particularly by allowing pitchers to switch to the stretch mid-inning upon the first runner reaching base, which shortens the delivery time and disrupts runners' timing for potential steals.^[4] This quicker motion from the stretch—averaging less time from leg lift to front foot contact compared to the windup—reduces the window for baserunners to gain an advantage, prompting managers to emphasize this transition as a tactical tool to maintain defensive control during innings with traffic on the bases.^[4] Pitchers often use the stretch position when runners are on base, including in late-game situations where relief pitchers frequently enter with runners already on base in high-leverage scenarios, enabling a rapid delivery that aligns with the need to limit scoring opportunities in close contests.^[2] This preference stems from the strategic deployment of bullpens in the seventh inning and beyond, where preserving leads requires minimizing runner advancement, and the stretch facilitates quicker throws to bases or home plate without sacrificing overall effectiveness.^[50] Coaching philosophies in youth baseball often start with the stretch position as the foundational technique due to its simpler mechanics and relevance to real-game pressures like holding runners.^[51] Instructors prioritize proper technique in both positions to foster rhythm and consistency, viewing proficiency as essential for long-term skill progression in young arms transitioning to competitive play.^[52] Analytics, particularly through MLB's Statcast system, play a key role in evaluating pitching position efficiency by quantifying variations in velocity and delivery time, revealing that fastball speeds can drop slightly in the stretch compared to the windup—often by less than 1 mph in professional levels.^[53] These data insights guide team strategies, highlighting how the stretch's time-to-plate advantage outweighs minor velocity trade-offs in runner-on-base scenarios, informing pitcher training and in-game decisions.^[53]

Notable Pitchers and Innovations

Nolan Ryan was known for utilizing a high leg kick in the windup position to generate exceptional velocity on his fastball, which contributed to his MLB record of seven no-hitters across his career with the California Angels, Houston Astros, and Texas Rangers.^[54]^[55] This technique allowed Ryan to maintain overpowering speed well into his 40s, striking out a record 5,714 batters while minimizing hits allowed at a career rate of 6.56 per nine innings.^[55] Greg Maddux was renowned for his exceptional defensive skills from the set position, particularly his quick and accurate pickoffs that deterred baserunners and limited stolen bases against him.^[56] His proficiency in this position earned him a record 18 Gold Glove Awards, the most for any player at any position, highlighting how effective fielding from the set enhanced his overall control and strategy on the mound.^[57] Pedro Martinez disrupted batters' timing and reaction by reading their bat speed to adjust pitches for deception.^[58] This technique contributed to his dominance with a career ERA of 2.93 and three Cy Young Awards, as it complemented his precise command and variety of pitches. In modern baseball, mastery of transitioning between windup and set positions has supported Justin Verlander's longevity and versatility across game situations.^[59] This approach has supported his career, evidenced by three Cy Young Awards (2011, 2019, 2022) and consistent performance into his 40s.^[60] Mastery of pitching positions has been a key factor in Cy Young Award success, with winners like Maddux and Verlander demonstrating how optimized stances enhance control, power, and baserunner management, as analyzed in their award-winning seasons where efficient transitions correlated with low ERAs and high strikeout totals.^[61] For instance, Verlander's performance in 2019 led to a 2.58 ERA and AL Cy Young, underscoring positional adaptability as a hallmark of elite pitching.^[60]

References

[1]
Windup Position | Glossary - MLB.com
A pitcher is considered to be in the windup position when he puts his pivot foot on the pitching rubber and has both shoulders facing the batter to some degree.
[2]
Set Position | Glossary - MLB.com
A pitcher is considered to be in the set position when he puts his pivot foot against the pitching rubber, has both shoulders facing first (for lefty pitchers) ...
[3]
5.07 Pitching - Baseball Rules Academy
There are two legal pitching positions, the Windup Position and the Set Position, and either position may be used at any time. Pitchers shall take signs from ...
[4]
Comparison of Windup and Stretch Pitching Biomechanics in ...
Apr 30, 2024 · Thus, some believe that pitching from the windup provides safety (less torque and force) and performance (greater ball velocity) advantages, ...
[5]
5.07 (a) (1) The Windup Position - Baseball Rules Academy
In the windup position, the pitcher stands facing the batter, pivot foot on the plate, other foot free, holding the ball with both hands. The free foot can be ...
[6]
[PDF] OFFICIAL BASEBALL RULES
If after the pitcher starts his windup or comes to a “set position” with a runner on, he does not go through with his pitch because the batter has stepped out ...
[7]
Legal Pitching Positions - UmpireBible
Oct 29, 2021 · The pitcher must stand facing the batter and his pivot foot must be touching the pitching rubber. (More about foot positions below.) Before ...
[8]
[PDF] Summary of Baseball Rules Changes - Retrosheet
In 1920 Rule 17 Positions of the Players, added, “nor shall the catcher leave his natural position immediately and directly back of the plate for the ...
[9]
WINDUP POSITION - Baseball Rules Academy
The windup position has three variations: hands together, hands apart, or hands apart then a pause before hands together. Both feet must be squarely on the ...
[10]
5.07 (a) (2) The Set Position - Baseball Rules Academy
Set Position shall be indicated by the pitcher when he stands facing the batter with his pivot foot in contact with, and his other foot in front of, the ...
[11]
The Stretch Position and the Set Position - Baseball Rules Academy
The Intermediate Stage is when the pitcher comes to “Set.” In the motion to come set, the pitcher is required to join his gloved hand and pitching hand ( ...
[12]
The Clinician's Guide to Baseball Pitching Biomechanics - PMC - NIH
The pelvis should have begun to rotate to face the target (about 35°) while the shoulders remain parallel to the target line, creating trunk axial rotation.
[13]
Throwing Biomechanics - Physiopedia
Initial stance: the pitcher faces the batter with the baseball concealed in their glove. Both feet are in contact with the ground. This is known as the wind-up ...<|control11|><|separator|>
[14]
Measuring the Average Peak Timing of Kinematic Variables in Youth ...
Jun 1, 2023 · Montgomery and Knudson found that the optimal average stride length of six professional pitchers was 85-90% of their height in order to increase ...
[15]
PITCHING MECHANICS, REVISITED - PMC - NIH
Other common faults related to pitch mechanics in the stride phase are ... mechanical problems in the stride direction phase of the motion. The teres ...
[16]
The Kinetic Chain in Overhand Pitching: Its Potential Role for ...
If the pitcher's body and momentum fall forward prematurely, the kinetic chain will be disrupted and greater shoulder force will be required to propel the ball ...
[17]
What's in a Delivery?: Detailing Mechanical Attributes
Apr 21, 2016 · Windups · Full Windup (FWU) Pitchers throwing from full windups raise and break their hands over their heads before moving into the leg-lift in ...
[18]
Evaluation and Treatment of Baseball Pitchers: There's More to ...
Jan 1, 2025 · Flexion: Increased elbow torque at ball release. Elbow Pronation/Supination, Effects “quality” of pitches, i.e., spin rate. Wrist Flexion ...
[19]
Pitching Biomechanics: Hip Shoulder Separation, Closing the Gap
Mar 16, 2021 · Most elite ball players (hitters included) can have anywhere from 30 degrees to upwards of 55 degrees of hip-shoulder separation. How much ...
[20]
[PDF] Trunk Contributions to Baseball Pitching Velocity
Mar 21, 2014 · • Peak transverse trunk rotational velocity was the highest data value of trunk rotation in the transverse direction between stride foot ...
[21]
Where Does Velocity Come From? - Mustard Baseball
Nov 28, 2023 · If a pitcher can get 40 to 60 degrees of hip and shoulder separation, he or she can get up to 80% of potential velocity from the torso.
[22]
2022 Draft Eligible College Pitchers with Unique Release Heights
Feb 15, 2022 · The average release height amongst pitchers with a minimum of one-hundred pitches thrown was 5.9 feet. Below is a dot plot which further emphasizes the ...
[23]
How Spencer Strider and Shane McClanahan use extension
Jun 2, 2023 · Strider combines all the inputs in the formula: Velocity, spin metrics, release height, vertical approach angle, extension. And, on the ...
[24]
Going Deep: Perceived Velocity - Pitcher List
Aug 2, 2018 · As mentioned, perceived velocity is as simple as a 95 MPH fastball appearing to come at a hitter, say, two MPH faster than it actually is.
[25]
Shadow pitching deviates ball release position: kinematic analysis ...
Mar 17, 2021 · Shadow pitching, commonly called “towel drill,” is recommended to improve the throwing motion for the rehabilitation of pitching disorders ...
[26]
Why is the baseball mound 60 feet, 6 inches away? - MLB.com
Aug 9, 2021 · In 1863, a pitcher's box was effectively created with the addition of a second 12-foot line, 48 feet from home base.
[27]
A Brief History of the Pitching Distance | by John Thorn | Our Game
Feb 27, 2015 · From 1845 to 1880 the pitching distance was 45 feet. The pitcher had to deliver the ball from behind a 12-foot line, at least until 1863.
[28]
The History of Pitching - The Baseball Umpire
The Set Position: Set Position shall be indicated by the pitcher when he stands facing the batter with his entire pivot foot on, or in front of, and in ...
[29]
The Field: The Pitcher's Area - 19th Century Baseball
For the first time the rules specifically stated that the pitcher's position was to be marked by a 6 foot by 6 foot box. Each corner of the box was required to ...
[30]
MLB Rule Changes | Baseball Almanac
The rules have evolved from the original Knickerbocker Rules in 1845, to the first set of National League rules in 1877.
[31]
October 7, 1867: Candy Cummings debuts the curve
Oct 23, 2014 · Cummings persevered and in due time mastered the magical pitch. He averaged 31 wins in his four (1872–75) National Association seasons and ...Missing: impact | Show results with:impact
[32]
Candy Cummings - Baseball Hall of Fame
He is often cited with the invention of a new pitch called the “curveball” that made him one of the most influential pitchers in baseball history.
[33]
PIONEERS: Candy Cummings. Eighteenth in a season-long series
Sep 18, 2023 · Cummings had to deliver his curve underhand, according to the rules of the day, with one foot just inside the front line of a “pitcher's box,” ...
[34]
[PDF] Baseball Playing Rules Changes Before 1950 - Milkees
The batsman, on taking his position, must call for either a “high ball,” a “low ball,” or a “fair ball,” and the umpire shall notify the pitcher to deliver the ...
[35]
[PDF] Baseball Playing Rules Changes 1950 to present - Retrosheet
2.61 SET POSITION mandated “coming to a complete stop of at least one second.” Page 4. 3.05 A player whose name is on his team's batting order MAY NOT BECOME A ...
[36]
A guide to rules changes in MLB (and sports) history
Feb 1, 2023 · There was also the 1920 outlawing of the spitball, the 2020 arrival of the three-batter minimum and the 2022 arrival of roster limits on the ...
[37]
NPB 101: Differences between baseball in Japan and MLB Part II
Mar 3, 2018 · Here are some more differences between NPB and MLB after watching the former for three years: NPB has a 28-man roster, MLB has a 25 and 40-man roster.
[38]
2024-official-baseball-rules.pdf
No information is available for this page. · Learn why
[39]
Umpire Signs & Signals - UmpireBible
Oct 16, 2023 · The signal for foul ball is the same as for "Time" or other dead ball situation: Raise both hands and call loudly "Foul." Make the call loud and ...
[40]
Replay Review | Glossary - MLB.com
Replay review in Major League Baseball is designed to provide timely review of certain disputed calls and is initiated by a manager challenge or by the umpire ...Missing: enforcement | Show results with:enforcement<|control11|><|separator|>
[41]
Pitch Timer (2023 rule change) | Glossary - MLB.com
Definition · The pitcher must begin his motion to deliver the pitch before the expiration of the pitch timer. · Batters must be in the box and alert to the ...
[42]
MLB 2023 rule changes: pitch timer, larger bases, shifts
Feb 1, 2023 · In an effort to create a quicker pace of play, there will be a 30-second timer between batters. Between pitches, there will be a 15-second timer ...
[43]
Minor-league pitch clock cut game times by 21 minutes in 2021
Sep 18, 2021 · As a result, the league has cut game times by 21 minutes. That's the direct opposite of MLB, where the average time of a nine-inning game is up ...
[44]
Average MLB game time dropped to 2:40 with pitch clock - ESPN
Oct 2, 2023 · The average time of a nine-inning major league game dropped to 2 hours, 40 minutes in the first year of the pitch clock.
[45]
Playing rules to be tested during 2021 MiLB season
“These experimental rules are designed to put more balls in play, create more excitement on the basepaths and increase the impact of speed and athleticism on ...
[46]
Comparison of Windup and Stretch Pitching Biomechanics in ...
Apr 30, 2024 · Conclusion: Pitching from the stretch was quicker and should be used with runners on base to prevent stealing. Pitching from the windup and ...
[47]
Julio Urias is elite at picking runners off
Sep 15, 2016 · Urias has allowed 105 baserunners, and he's picked off six of them. That's a rate of 5.7 percent. He's nearly doubled down on the rates posted ...
[48]
Does the stretch cost a pitcher fastball speed? - The Hardball Times
Apr 20, 2010 · A great windup allows you all the time you need to hide the ball and distract the batter. Milliseconds are everything and if you can force the ...
[49]
SET VS. WINDUP POSITION - Baseball Rules Academy
If the pitcher is pitching from the wind-up position this is a legal play. If the pitcher is pitching from the set position, that is a balk or an illegal pitch.Missing: 1920 | Show results with:1920
[50]
https://www.mlb.com/news/jp-sears-reintroduces-windup-to-pitching-pattern
[51]
JP Sears reintroduces windup to pitching pattern - MLB.com
Mar 2, 2025 · ... windup into his pitching approach, a method he has not leveraged since 2019. He's pitched almost exclusively out of the stretch since then ...
[52]
Pitching Basics: Stretch vs Windup
Mar 26, 2018 · This article is focused toward the instruction of youth baseball players but will also contain some concepts and suggestions for players at ...<|control11|><|separator|>
[53]
Coaching Youth Pitchers Installment Three: Windup or Stretch?
A lot of coaches will opt for teaching young pitchers to pitch exclusively from the stretch because they think it's easier to learn and makes it less ...
[54]
Best of BP: The Value of Relative Velocity | Baseball Prospectus
Jan 1, 2025 · When runners get on base and Strider goes from the windup to the stretch ... We're going to use Statcast data for starting pitchers from ...
[55]
Ryan, Nolan | Baseball Hall of Fame
### Summary of Nolan Ryan's Pitching Style, Windup, and No-Hitters
[56]
Maddux, Greg | Baseball Hall of Fame
### Summary of Greg Maddux's Fielding, Pickoffs, Set Position, and Gold Gloves
[57]
Pedro Martinez on the Art and Science of Pitching
May 23, 2014 · Pedro Martinez was a genius with a baseball in his right hand. One of the most dominant pitchers of all time, he didn't just overpower hitters. He outsmarted ...
[58]
Justin Verlander Stats, Age, Position, Height, Weight, Fantasy & News
Justin Verlander #35 P Summary Stats News Awards Shop Batting Pitching 2025 Regular Season Career Regular Season Justin Verlander BioMissing: versatility | Show results with:versatility
[59]
Justin Verlander Stats, Height, Weight, Position, Rookie Status & More
Justin Verlander ; Position: Pitcher ; Bats: Right • Throws: Right ; Born: February 20, 1983 in Manakin Sabot, VA us ; Draft: Drafted by the Detroit Tigers in the ...Missing: hybrid | Show results with:hybrid
[60]
Cy Young Award Winners | History - MLB.com
From 1956 to 1966, the award was given to one pitcher, but has been given to one pitcher per league since 1967. The vote totals are based on a weighted points ...