Four starting quarterbacks were injured and forced from their games Sunday.

St. Louis’ Marc Bulger left the Rams’ 30-10 loss to Seattle on the fourth play from scrimmage after hurting his back.

He walked off the field, and X-rays taken at the stadium were inconclusive. He went to the hospital and had a CT scan, which revealed no broken bones, and will undergo further tests after returning to St. Louis with the team.

Coach Mike Martz said Bulger might have damaged one or more discs in his back and will not play against San Francisco next Monday night.

Denver quarterback Brian Griese left the Broncos’ game against the Oakland Raiders late in the second quarter with a left knee injury.

Griese was hurt on a crushing sack by former Broncos linebacker Bill Romanowski with 4:32 left in the first half.

Bears quarterback Chris Chandler left the Bears’ game against the Carolina Panthers in the second quarter with a concussion.

Chandler was knocked to the ground by Carolina defensive end Brentson Buckner, who was penalized for roughing the passer. Chandler stayed down for several minutes, then walked off the field with help. Henry Burris took over.

In the third quarter against Tennessee, Jacksonville quarterback Mark Brunell strained his hamstring. Jimmy Smith (shoulder) and Fred Taylor (ankle) all missed portions of the game with injuries.

Cincinnati running back Corey Dillon bruised his left elbow and missed the fourth quarter of the Bengals’ 20-13 win over New Orleans.

Green Bay Packers safety Darren Sharper sprained his right knee against Buffalo while returning his league-leading seventh interception and will be re-examined Monday.

Atlanta fullback Bob Christian fumbled on a hit by Detroit’s Barrett Green that left him unconscious. He was carted off the field after being revived and did not return.

Raiders CB Charles Woodson returned after missing two games with a leg injury, but did not start and was not in uniform for the second half against Denver.