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Shoulder Joint Impingement:
Gurus and unfortunately surgeons think the upper arm (humerus) can impinge with the Acromion of the scapula bone when pitching a baseball.
According to the gurus, the shoulder is most vulnerable to impingement when the arm is at 90 degrees of abduction and the scapula has not rotated sufficiently
Shoulder joint abduction moves the Humerus bone from hanging vertically downward to horizontally even with the height of the shoulders.
In this position, the head of the Humerus bone is nowhere near the acromion process of the Scapula bone.
The rotational position of the Scapula bone does not change the positions of the head of the Humerus bone and the acromion process of the Scapula bone.
What most pitchers don’t understand is that their arm can’t go above 90°
Thoughts and prayers for Trey Yesavage.
Trey is close, but close doesn’t count when pitching a baseball
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