if he is projected to be a forth round pick or better I think it would be in his best interest to go pro, running backs just aren't taken very early in the draft anymore and the biggest knocks on AA is that he lacks break away speed and his size which are two things he cant really do anything about, I don't see him ever being higher than a third rounder, for my own selfish reasons I hope he stays because Nebraska is without a doubt a better team with him on the roster but if he gets hurt like lucky or rex did an his draft stock suffers that would really suck for him