I tried to tell our coaches that I wanted my son to be a P.O. this past summer. They laughed. He plays almost every inning in the field and is an average hitter but really doesn’t even focus on hitting anymore. He is going to college as a pitcher and even though he likes to think he may play both ways, he was really recruited as a pitcher and we both know he will realistically be a P.O. in college. I felt that the extra work/ throws in the field would possible have him less rested as a starting pitcher. They did move him from 3rd to 1st a lot to help with that as well as other reasons. In the end it all will work out and the game/ coaches will tell you when to hang up the bat.
Nor cross- truly not trying to be critical of the work out plan. Each kid is different. My only point is to try and make sure it remains a game and not a job at 16. If he is having fun and willing to work that hard then go for it. Mine currently does not work quite that hard, but I have told him that when he goes off to school to be prepared for it to get tougher and be more like a job because at that point they are somewhat paying him to be there .