He's an offensive lineman. It wouldn't surprise me if there is less head trauma in that position than in others. Here's some data wrt to OL being the worst pos

He's an offensive lineman. It wouldn't surprise me if there is less head trauma in that position than in others. Here's some data wrt to OL being the worst position actually. http://www.newyorker.com/magazine/2009/10/19/offensive-play http://www.newyorker.com/magazine/2009/10/19/offensive-play This is a crucial point. Much of the attention in the football world, in the past few years, has been on concussions—on diagnosing, managing, and preventing them—and on figuring out how many concussions a player can have before he should call it quits. But a football player’s real issue isn’t simply with repetitive concussive trauma. It is, as the concussion specialist Robert Cantu argues, with repetitive subconcussive trauma. It’s not just the handful of big hits that matter. It’s lots of little hits, too. That’s why, Cantu says, so many of the ex-players who have been given a diagnosis of C.T.E. were linemen: line play lends itself to lots of little hits.