Raiders QB situation unclear

ALAMEDA, Calif. (AP) - Oakland Raiders coach Tom Cable may wait until Sunday to name a starting quarterback for this week's game at Denver.

With starter Bruce Gradkowski limited because of a sore throwing shoulder, backups Jason Campbell and Kyle Boller split reps in practice Wednesday and punter Shane Lechler even took a handful of snaps with Oakland's starting offense.

Campbell, who began the season as Oakland's starter before being benched at halftime in Week 2 against St. Louis, has a sore left knee that was injured in last week's 17-9 loss to San Francisco. It was the worst performance of Campbell's career.

The veteran quarterback, who was acquired from Washington in an offseason trade, completed only 8 of 21 attempts for 83 yards and a career-low 10.7 rating.