Jason Kelce announces his retirement

Dave Spadaro

Thirteen seasons, every one of them as a starting center for the Philadelphia Eagles, taking one of the game's most grinding positions and making it, well, into something glamorous in a take-your-shirt-off-and-pound-beers-kind-of way, which was just perfect when you're talking about Jason Kelce.

A sixth-round draft pick in 2011 who not only defied the odds - a Forbes.com study concluded that 1