Mike Sellers tweaks back, hospitalized

ASHBURN, Va. -- Washington Redskins fullback Mike Sellers is hospitalized after hurting his back on a rowing machine in the team's weight room.

Coach Mike Shanahan said Thursday that Sellers would stay in the hospital overnight.

The injury is one of many for the Redskins. Cornerback DeAngelo Hall did not practice because of a hip injury, and left tackle Trent Williams is sidelined with a sprained right ankle.

Linebacker London Fletcher, who has played in 214 straight games, was limited with a sore hamstring. Shanahan said it's "hard to even think about a guy like that being out -- he'd have to be out there on one leg."

Backup quarterback Rex Grossman was able to take a few snaps. He was hospitalized this week with pneumonia.