The Achilles' heel of Mathews continues to be his health, but he truly broke out in his fourth season amid the injuries.
Mathews ranked seventh in rushing yards (1,255), ninth in yards per game (78.4) and tied for 10th in rushing first downs (54). His six games with at least 100 yards rushing ranked second next to LeSean McCoy's seven.
That said, Mathews' body broke down as the season wore on. In the postseason, Mathews carried the ball just 18 times over the course of two playoff games. He was hardly a factor in the win over Cincinnati and almost nonexistent against Denver.
In a contract year, Mathews still has a lot to prove. For one, he needs to be able to stay healthy, and the front office has provided him with the help necessary to do so. He also needs to show he can be consistent. Just a few years ago, he struggled to hold onto the ball.
Now in his fifth year, Mathews has the odds in his favor to post another solid season. The depth at running back is there, his offensive line remains unchanged from last season and the offense shouldn't be all that different despite Ken Whisenhunt's absence.