Maybe the school is the perfect fit for him?
Maybe he loved the size and feel of the campus?
Maybe the school is the perfect match for his major?
Maybe it's an incredible baseball program?
Maybe he loves the head coach?
Maybe he would rather play for a Top 15 D2 than play at a 200th ranked D1?
Maybe they offered him a significant scholarship?
Maybe he would rather play at a school that consistently wins 70% of the time than one that usually only plays .500 ball?
Maybe he would rather play at a school who is in the running for a national championship than one who has no shot?
Maybe he would rather have a chance to play as a freshman than sit the bench for one to two years?
Maybe it's all of these reasons?
Maybe people can stop asking him why he went D2 instead of D1?