Pitching Mechanics Analysis
Joel Zumaya
8/19/2008
Joel Zumaya has recently been having shoulder problems. The
root cause of his problems is revealed in the video clip below.
Joel Zumaya
What you see in Frame 32 is significant
Hyperabduction, where Joel Zumaya's Pitching Arm Side (PAS) elbow gets
both above and behind the level of his shoulders as in the two
photos below.
Joel Zumaya
Joel Zumaya
This
Inverted V arm action creates a significant timing problem
(aka rushing) such that Joel Zumaya's shoulders start rotating well before his
PAS forearm is vertical and in the
high-cocked position.
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