What does he have to prove, that he's an NFL caliber QB? He is the starter for the foreseeable future, he is the franchise, that's not even debatable. He is one of the better QBs in the league ( only 5 QBs had more TDs ) , there is nothing more to prove, he just needs to keep getting better and hone his craft, IMO the game will slow down even more for him next year.