ARLINGTON, Texas (AP) -- Raiders right guard Mike Brisiel left Thursday's game against Dallas after injuring his knee on Oakland's first offensive play.
Oakland cornerback Mike Jenkins came out of the game in the fourth quarter with a shoulder injury. He had left Sunday's game against Tennessee early because of a concussion.
Cowboys running back Lance Dunbar was out with a sprained left knee after turning it awkwardly on a run in the fourth quarter. Dunbar, who ran 12 times for 82 yards, walked off the field under his own power.
Brisiel stayed down for a couple of minutes after Oakland's opening play, though he walked off the field without any help. But the team later said he wouldn't return without providing additional specifics about his injury.
The guard also left the game at Houston on Nov. 17 with a knee injury. He was cleared after an MRI the following day.
Brisiel and left tackle Khalif Barnes are the Raiders' offensive linemen who have started every game this season.