Infield your post is good but I think TRs question is legite if not a little blunt. This young pitcher has to control his use. If he feels he is over used then he should tell his coach that he isn;t ready. I know they all want the ball but isn't it really a shame these kids are not aware and taught to say no.
I once offered to get my son's doctor to talk to one of his elite teams. I was amazed that they didn't take up the offer. TR seems to be the kind of coach who cares about his players and if a player said he was done would respect that. I thought his question was a good one.
Even with an educated player injuries still occure and it is the nature of over shoulder activity. Most occupations where you are working over head have a susceptability to this type of injury.