Rock's chance to roll; a Gray-to-Memphis report

At the beginning of the season, the coaching staff made it clear veteran running back Rock Cartwright would not have a role on offense. The Redskins had four running backs on the opening 53-man roster (they carried five at one point) and Cartwright was last on the depth chart at the position. Although active every week because of his standout work on special teams, Cartwright was he was the odd man out in the backfield mix, barring a catastrophic situation. Well, that's kind of what the Redskins have experienced with their running game. Top back Clinton Portis has sat out the last two games because of lingering vision problems from a concussion and backup Ladell Betts suffered a season-ending knee injury in the 7-6 Week 11 loss to the Dallas Cowboys. Cartwright stepped up when Betts went down, contributing 67 yards rushing (with a 5.2-yard average) and team-highs with seven