It's not like Cardinals running back David Johnson came out of nowhere. The Cardinals took him in the third round of the NFL draft, after all. But no one in the league foresaw the monster offensive season Johnson turned in during the 2015 campaign. He established himself as a versatile triple threat, able to confound defenses by running the ball, catching the ball, and returning kicks. His statline reflects his hugely productive season as well — 13 touchdowns and more than 1,600 yards are great numbers for anyone, not just a rookie. He showed his most exciting potential against Philadelphia last year when he gashed the Eagles for 187 rushing yards and three touchdowns. The future of the Cardinals' backfield looks bright.