Rock Cartwright RB SF Mar 15 '12
49ers signed RB Rock Cartwright to a one-year contract.
A career special teamer save for two short stints in Washington, Cartwright appeared in 31 games for the Raiders the past two seasons. He's carried the ball only 13 times since 2009. He'll help make up for the loss of Blake Costanzo on the Niners' special teams unit.