igball - Thats really great! Congrats (in advance).
Things have changed, so I could be off base on this. But 5-6 years ago, top pitchers and/or legit middle infielders (remember that nearly every infielder on a college team played SS in HS) would get over 50%. The very top pitchers (i.e. top recruit at a school) would get 75+%. It may have changed?
Questions to ask...some they will answer before you even ask (other than being rude, there are no questions to avoid IMO):
* Are they recruiting him as an RHP or MIF? If both, how will they make that work?
* What do they see as your son's strengths and weaknesses?
* Who else (or how many others) are they recruiting in this year's class?
* What is their policy/practice on renewing scholarships? (I asked this question of every coach 6 years ago...and they all answered).
* What is the nature and resources for academic support?
* What are the majors of the players currently on the team?
* What role do they see for your son as a freshman?
* Where did they see your son play? What caught their eye?
Good luck!