correct. all good pitchers have some forearm bounce but if it is too violent it can hurt a pitcher. that guy is really extreme as his arm is maximally internally rotated. that means he has to ER to arm a lot to get to the fully loaded position (maximum ER).
Originally Posted by songtitle
Teach him to swing the arm up with the thumb pointing up instead of down this will keep his hand above his elbow.
I think walks are overrated unless you can run. If you get a walk and put the pitcher in a stretch, that helps, but the guy who walks and can’t run, most of the time he’s clogging up the bases for somebody who can run. – Dusty Baker.