By Jerry McDonald - NFL Writer
Wednesday, April 28th, 2010 at 2:13 pm in Oakland Raiders.
The Raiders confirmed the signing of running back Rock Cartwright Wednesday on their Web site, adding depth to a thin corps of running backs.
Cartwright was at the facility and will participate in the minicamp this weekend. The Raiders are looking for a third running back to team with Darren McFadden and Michael Bush after cutting Justin Fargas in the offseason. Cartwright has extensive fill-in duty as a member of the Washington Redskins.