The entitlement to not only a scholarship, but a full rude is bizarre. Kids getting drafted by MLB teams are only getting 30% rides. But you want to use baseball, a sport he has not played in years, to get free tuition.
I would see where track takes me and if that doesn't pan out head to a juco where he can still major in architecture, probably compete in track and field and most importantly do it at a fraction of the cost.
Going to a college and telling the coach to give you his best is not even an option. A school like Ole Miss has 8k kids who want to do the same thing. They don't have time for that. Email goes straight to trash.