1) Check current rosters of the schools he is interested in. See where the players are from, and check their bios.
2) Then go over to Perfectgame.org and do a player search on some of the pitchers on the team for their HS measurables. You may get an idea of the fit for those schools or where to aim.
When keewartson was first "looking" or rather, taking an interest in, colleges outside of VA, he suggested Dallas Baptist. A quick look at the roster and ALL of the players came from Texas, at that time. It is eye opening to see rosters of big schools in Florida, Texas, and CA select most of their players from their own state.