Pitching Mechanics Explained

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Pitcher from the separation point during delivery of a pitch

Pitcher at the "Power Position" Proper Mechanics

Figure 1 Source: Edward Sanderson. 26 May 2010 < http://www.edwardsanderson.phanfare.com/4594876_5065134#imageID=94857654 >.

The pitching sequence can be broken down into five or six independent parts.

Stand Tall but relaxed.
Slight step backward of the pitching rubber. (Opposing leg to throwing arm)
Come to a balance position. (Normally involves a leg kick in the wind up position)
Separation point. (Depicted in proper form above)
Power Position. (Glove is drawn in to the chest)
Follow through to fielding position.

This high school varsity pitcher has excellent form. This balance position shows the throwing elbow is at or slightly above the shoulder. The glove hand is relaxed and is being drawn "Glove to Chest" as the torso begins rotation toward home plate. The feet are in good position, the only real flaw in this picture is that he is landing on his heel instead of softly landing on the inner big toe area. Landing on the heal can cause a jarring effect which can cause the pitch not being located where it is desired. This is called "Missing your spot."

Pitcher from the Balance point incorrect form

Pitcher at the "Power Position" Poor Mechanical Position

Figure 2 Source: Edward Sanderson. 26 May 2010 < http://www.edwardsanderson.phanfare.com/4591117#imageID=94617449 >.

Some pitchers (see figure 2) with extreme height at an early age may have more difficulty combining all the mechanical aspects to achieve maximum velocity because the body does not move as fluidly. This pitcher at nearly 6’ 8” has great potential, but several things need to be corrected by proper timing in hopes of preventing needles injury.

The following points can be observed in this photograph concerning the balance point:

All energy has been transferred to the front leg, even before separation starts to end. This makes the wind up useless.
The torso has already started to rotate while dragging the arm behind. Extreme pressure is being placed to the rotator cuff. This creates an "all arm" pitcher.
The glove hand is already contracted to the chest before transferring to the "Power position."
Working from the feet up. The entire timing process is wrong.