Ladell Betts has knee injury
The Redskins were already without starting running back Clinton Portis, who has missed the past two games with a concussion.
Now they have lost back-up Ladell Betts to a knee injury for at least the rest of this game. There is no word on the extent of his injury.
Betts had four carries for five yards before being injured.
Rock Cartwright has 129 combined yards (63 rushing and 66 receiving) as the Redskins lead 6-0 after three quarters against the Cowboys.
