From a Dad of a kid who had UCL primary repair with internal brace done by Jeff Dugas at Andrews Sports Medicine I'd offer 2 pieces of advice:
1. Get a closed MRI with dye injection (open MRI is a waste of $)
2. Get a 2nd opinion from a baseball specialist doctor (Andrews will look at it if you overnight a CD to them and let you know what they think).
My son had the surgery Fall of his Junior year and pitched and played the following Spring/Summer. Now playing as a freshman in college. Good luck.