I follow and trust this guy. I don't always understand technically why, but basically it tightens up the shoulder and limits range of motion, especially bench and even more so if done incorrectly. I advise my son to do dumbbell bench, not too heavy and to do landmine presses.
https://ericcressey.com/should-pitchers-bench-press
https://ericcressey.com/3-more...-players-bench-press
Just my opinion.