Thanks for all the suggestions so far, both public and private.
He's coming off an elbow injury that kept him out of school ball and just getting into a return to throw program under guidance of a baseball specialist PT, along with a baseball specialist strength and conditioning guy in the area. Looking to pair that up with someone to help him throw in a good pattern for both health and increased velocity, which he needs. Understand there's inherent health risk in throwing/pitching, but want to try to minimize risks as much as possible, while maximizing performance.