In your opinion what the worst he could realistically do in the NFL? In my opinion at worst he would be would still be an upgrade over Lewis and Roman at SS maybe not a Polomalu or a Wilson but still one of the top strong safeties in the league. I know, I know, you don't spend a top 15 pick on a SS that isn't a top fight guy but I also believe that he has the potential to be as good if not better as the aforementioned players as well with some good coaching.
Here is why. How many top NFL DBs has USC produced after Polomalu? (who only player for Carrol 1 or 2 years but wasn't recruited by him) None. Maybe Mays' lack of production is because of the system at USC and/or the DB coaches and not because he will never live up to the potential that his talent dictates.
Either way if we win out and our draft pick is in the mid to late first round and its between reaching for the 4th best OT or we already took one and Mays is still there. I say we take him. Even though most on the board have been scared away by raw talented players because of Balmer don't forget that VD was also a raw talented player as well.