quote:“found a respected exercise physiologist who works with pitchers”
All respected pitching coaches do not understand why this injury is produced and will exacerbate the problem by not giving him the proper fix by changing the way he brings the ball back then up at the right time early with the hand under the ball! Ask him if your son should bring the ball up with his hand under the Ball thumb up supinating? And see what he says, if he says the hand should be on top of the ball pronating with the thumb down then he teaches what everybody else teaches and the problem will persist by not having the humerus transitioned early enough to prevent forearm bounce during the acceleration phase.
quote:“and he was trying to improve the mechanics from the previous instructor”
Pitching coaches that have better perceived credentials who teach the same mechanics produce the same affects. Ask him if he is aware of Dr.Marshall and what he thinks?
quote:“Some of which had to do with lack of follow through”
Tell him that follow through after release produces no stress in the elbow but does produce stress in the shoulder from across the chest recovery.
quote:“and not using his legs as much as he should which puts more strain on the elbow.”
This is exactly the opposite!!! The more power delivered from the legs will add stress not relieve it. We actually want more leg power but delivered to a proper arm and shoulder mechanic. Legs have nothing to do with UCL overstress and misuse.
Show these comments to him and bring him here to HSBW if wishes to comment on these contentions. If he refuses to look at least look into this information at the correct source (Dr.Marshalls web site) you have a decision to make.