Scorpio get in touch with Eric at amedicalmassage.com he is awesome he can advise you on stretching and strengthening he has worked with many fighters am/ pro real knowledgeable he works with Keith Thurman and Edner Cherry on their teams I know him from St pete boxing in florida real good guy
its good to rotatar cuff excerises but just as important get your shoulder muscles stronger do isolation excerises for front delt side delts rear delts and shoulder presses bodybuilding type isolation stuff is great to do here