the man clearly is physicallly fine and healthy. i would come up with some tired shoulder wakefield type deal and have him go home and do no baseball activities or watch any games for 10 days but go to the movies, biking and wind down a bit. the guy is clearly pressing and is TOO intense. he cares way too much. bring him back slowly after 10 days. plug him back in there in late august. if he still  stinks after 2 starts, you give it a rest for this season. still think we have a youk type situation, this kid is far from done, just a slump, not the end.