quote:“he felt that his mechanics were a mess and seemed to blame his shoulder problems on his mechanics.”-Rob Nen
He was exactly right!!!! His over early rotation caused his velocity drop by loosening his gleno Humeral (holds the Humerus in the scapula) and UCL(holds the ulna to the Humerus) ligaments where the head of his humerus was pushing forwards against fossa (socket) at the start of transition (this grinds the labrum at the front also) and start of acceleration, then slides across to the back of the Fossa to disrupt the Labrum and ligaments there just like a mortar and pestal.
To bad he did not look up the fix by just keeping the humerus in line with your shoulders all the way through transition, acceleration and release!
When his UCL finally tore all the way through it ended it, this injury is easily fixable also by not bringing the ball back then up with your hand on top of the ball causing later “forearm bounce” that is nothing more than mechanics and has nothing to do with pitch counts other than you must pitch some with these bad mechanic in order to injure yourself.