MLive will review each of the Detroit Lions' position groups heading into the start of training camp on July 27. Today: Running back.
Roster locks: LeGarrette Blount, Kerryon Johnson, Theo Riddick
Competing: Ameer Abdullah, Zach Zenner, Dwayne Washington, Nick Bawden (fullback), Nick Bellore (fullback)
Notable departures: Tion Green
Breakdown: The Lions forwent any material upgrades in their offensive backfield last year. They believed in the guys they had. That was a mistake. Nobody gained fewer yards per carry than the Lions last year. Nobody gained fewer yards per game.