CEBU75 - just keep in mind that once he actually gets on campus, the coaches can and might tell him they only want him to pitch. Especially after Fall practices. Many a kid has transferred out after one year because of lack of playing time or being asked to play a role they don't want, or even being flat out told "we don't have a spot for you anymore".
That is why people always say "go where you are loved". If your son ends up getting multiple offers, the subject of whether the coaches want him as a PO or not would be wise to communicate about ahead of time. (Conversations between player & coaches only)