Carolina lost left tackle Jordan Gross to a broken right ankle midway through the second quarter. Gross was blocking when a Falcons player fell into his leg, which bent awkwardly.

Jacksonville wide receiver Jarrett Dillard broke his right ankle after a 7-yard catch on the first play of the second quarter in the Jaguars' 24-22 win over the New York Jets. Coach Jack Del Rio said it was a season-ending injury.

Quarterback Kyle Orton sat out the second half of the Denver Broncos' 27-17 loss to the Washington Redskins on Sunday with an injured left ankle and was unsure whether he'll be able to play next week.

Orton came up hobbling after being tackled on a third-down scramble right before halftime. He was on the sideline during the second half, his ankle heavily taped.

"I was hoping to come back out, and I just wasn't able to," said Orton, who was 11 for 18 for 193 yards and two long touchdown passes to Brandon Marshall.

Orton said he tried a few practice throws coming out of halftime, but then told coach Josh McDaniels he wouldn't be able to play. Orton said after the game it was too soon to say whether he would be able to play against the San Diego Chargers next Sunday.

"I'm not going to sit here and talk about it," he said.

Miami running back Ronnie Brown was also uncertain of his status after injuring his right ankle in the third quarter of the Dolphins' 25-23 victory against Tampa Bay.

Brown, on crutches after the game, limped off the field assisted by teammates and later hobbled to the locker room, where he watched the end of his team's win.

"We took X-rays. We'll wait to see what happens," Brown said. "I don't think it's too bad."

Brown was hurt on a running play that ended with his lost fumble.

"I kind of rolled my foot to the inside," he said. "It's tough coming out of the game. Fortunately we were able to get a W. I just don't like being on the sidelines."

Brown finished with 82 yards rushing and a touchdown. His absence meant a busier load for Ricky Williams, who ran for a season-high 102 yards.

Philadelphia running back Brian Westbrook left the Eagles' 31-23 loss at San Diego after another concussion. His last carry was during the opening drive of the second half.

Westbrook missed the previous two games with a concussion.

Pittsburgh safety Troy Polamalu reinjured his left knee early in the Steelers' 18-12 loss to the Cincinnati Bengals.

After the game, Steelers coach Mike Tomlin said Polamalu was undergoing an MRI exam. Polamalu missed four games earlier with a torn medial collateral ligament in his left knee before returning Oct. 18 against Cleveland.