2. Steven Jackson
Steven Jackson has been arguably one of the toughest players, let alone running back, in the league for some time now. He has gotten hurt often, but has always managed to play through the pain, posting multiple 1000 yard seasons time and time again in the process. It might be a bit odd to see him out of his classic St. Louis Ram's uniform now, but make no mistake about it: Steven Jackson just made the Atlanta Falcons an even stronger Super Bowl contender. Michael Turner, once a great running back for the Falcons, struggled a lot in recent years, losing his trademark explosiveness along the way. Jackson, however, is still as ferocious as he once was, giving this already deadly offense yet another weapon. Before, teams had to be concerned about Roddy White, Julio Jones, and Tony Gonzalez ruining their day. Now, though, teams must be prepared for a brand new running back that can play with the best of them still. Steven Jackson might be getting older, but don't let that fool you: the man can still play.