Doug Martin: The NFL's biggest surprise

2:16 | NFL
Doug Martin: The NFL's biggest surprise's Jim Trotter takes a look at Tampa Bay Buccaneers' RB Doug Martin and his remarkable rookie campaign.
SI Apps
We've Got Apps Too
Get expert analysis, unrivaled access, and the award-winning storytelling only SI can provide—from Peter King, Tom Verducci, Lee Jenkins, Andy Staples, Grant Wahl, and more—delivered straight to you, along with up-to-the-minute news and live scores.