What It Means:

Zenner made the roster last season, but multiple broken ribs and a partially collapsed lung landed him on injured reserve after Week 6. He was cleared to resume football activities in January. Zenner will need to beat out George Winn and seventh-rounder Dwayne Washington to secure a roster spot, but that is not a herculean task if he is healthy. Depending on how Stevan Ridley looks, Zenner could even find himself as the "big-back" complement to Ameer Abdullah.

On 17 carries last year, Zenner earned a -0.03 Rushing Net Expected Points per attempt mark. Ridley had a -0.21 rate in this metric on 36 carries.