Look: he may well not make it to an NFL roster, and after he suffered a concussion last season I certainly understand why he'd tweet this:
Concussion symptoms didn't want to risk it.. Thanks to the browns for the opportunity. Health trumps football any dayExcept for this: law school is always going to be there, and I imagine he'd do even better on the LSAT without the burdens of playing Big Ten football. Meanwhile, why not give the NFL a try, and if he ever suffers concussive brain trauma again retire immediately -- though I'd note that whatever long-term health impact football will have on him, most of it has already been incurred from having played high school and college ball. So I side with Elie Mystal:
Maybe playing in the NFL would take an incredible toll on his body, but this is the only time in his life, forever, that he’ll get a chance to try to make that career happen for himself and reap the considerable economic rewards that come from being a player in the NFL. Going to law school and becoming a lawyer will take an incredible toll on his personality and psyche, and it’s a journey that can be started at any time. He could break his neck and become a paraplegic and still go to law school. But it’s very likely that even one year of sitting in a classroom listening to somebody drone on about torts and civil procedure will kill his football career.Update, May 17: This post has been denounced and rejected by its author.