2) Jason Peters, Philadelphia Eagles: After spending his collegiate career at Arkansas as a defensive lineman and (massive) tight end, Peters went undrafted in 2004. Little did anyone know that he would emerge at one of the game's elite bookends. He overwhelms opponents with his size and athleticism, but is also a technical marvel with the footwork and fundamentals to handle anyone off the edge. His ability to man the back side without assistance allows Chip Kelly to fully flood the passing game with five eligible receivers. Most importantly, Peters' presence at left tackle has allowed young QB Nick Foles to settle into the position without worrying about taking a big shot from behind. Given the correlation between protection and production for the quarterback, Peters' exceptional play is one of the keys to the Eagles' potency under Kelly.