Wow. I don't know where to start. If he did so well in travel at PG and PBR events, and he is still taking private instruction and working an off-season throwing program, why does he no longer have interest in playing college baseball? Why would he do that just for a HS program that he doesn't like and you hate? If he did so well w/ travel, PG and PBR, and has consistently been a great player for years, why is he only getting some interest from D3? If the HS baseball team is such a perennial winner and desirable program to be a part of, as you have stated in previous posts, how can they have two starters that are even dangerous to have in the field? If the dad of a fellow travel team player of your son, not from the same HS but lives in the same state says to you that your son should be starting varsity, why the heck wouldn't your son's HS coach be listening to him? Geez, you were right all along. That coach is an idiot. Just because your son has a weird throwing motion, that doesn't mean he shouldn't get more attention and opportunity at higher levels. Geez, he's totally getting the job done at HS JV.
Seriously, as we approach page 11, you seem to have listened to absolutely none, zero, of the advice given by an audience that can help you, and in turn, your son. It's getting late and that door is closing quickly. Go back and read your posts in this thread and, more importantly, the responses. Think about what advice others are trying to give you, not about what you want to hear. It is becoming extremely unlikely your son will be able to survive a college baseball program, regardless of how far his skill set may continue to advance. So, he may have made a wise decision. It may not be too late but the fat lady has her harmonica out, humming her notes.