Three years removed from a sizzling rookie campaign that saw him rumble for 1,454 yards and 11 rushing touchdowns, Martin has been slowed by shoulder, knee and ankle injuries over the past two seasons. After burning through opponents for 4.6 yards per carry as a rookie, he's logged just 3.6 yards per tote since. It's worth noting that Martin played last season behind an absolute train wreck of an O-line.