In the context of most D3 academic schools.......If your screen name reflects his desires, his future academics and baseball team will most likely be determined by continued strong GPA and future SAT/ACT scores. Top academic schools recruit their baseball players through academics. Occidental and Hopkins are examples, but there are more such as the NESCAC conference. So, he'll want to be one of the best baseball players to get the coaches "tip", and have the best grades to get the Admissions Committees approval. Sorry, I don't have practical knowledge of D2.
If you scan D3baseball.com, you'll notice an abundance of D3 schools on the east coast. If you think you are headed in the D3 direction for academics and baseball, it wouldn't hurt to familiarize yourself with those schools and how they recruit.
Good luck!