Chances are very good that, if he stayed, he would have a degree, be the big
man on campus for another year, and be in as good, if not better, draft position. He would have set some records too. He may have gotten hurt but that's the only possible downside. He would not hurt his football lifetime earnings at all because he is a stretch to have a NFL career anyway. I.E. his career will end based on his lack of ability instead of his body breaking down. He is gonna need that degree. Hopefully, he will save enough cash to finish it.