He is only 27, and has had an amazing career. Especially considering he's been playing through tough injuries pretty much every game for the past 2-3 seasons. I think due to those injuries, it's going to be time in the near future for his role to decrease. Not that he can't still be a huge asset. At least, that is, if he intends on having any quality of life post NFL. The fighting for every extra inch he can get isn't even the beginning of what makes the guy so tough, I think many games it is just being on the field to begin with. Then, with those injuries, he still regularly just puts the offense on his back and takes over games.