Bush out for next game with knee injury

Haslett said Jackson would undergo an MRI, but Jackson thought he'd be fine for next week's game at New England.

"It's a little tight," Jackson said. "I'm able to walk and I'm able to bend it, so that's a good sign."

Injury troubles kept mounting for the Cowboys.

Safety Roy Williams broke his right forearm for the second time in his first game back from the previous injury, and owner Jerry Jones said he'd miss the remainder of the season.

Williams, who has made the past five Pro Bowls, was hurt midway through the third quarter. It was not clear how he was hurt.

A jolting block by Pittsburgh receiver Hines Ward broke the jaw of Cincinnati rookie linebacker Keith Rivers, likely ending his season.

Ward knocked Rivers down on the fourth play of the Steelers' 38-10 victory. Rivers, a first-round draft pick, stayed down on the field for several minutes before walking off without assistance. Tests found the fracture.

Ward, a former Super Bowl MVP, is known as one of the league's toughest blockers. He wasn't penalized for the block against a player who is 2 inches taller and about 35 pounds heavier.

Steelers cornerback Bryant McFadden and safety Troy Polamalu got hurt on the same play in the fourth quarter. McFadden injured his arm and was expected to have tests. Polamalu lost his helmet while tackling running back Cedric Benson and was unsteady as he walked off the field. Neither returned to the game.

The return of tight end Jeremy Shockey and wide receiver Marques Colston from injuries not only didn't provide a boost to the offense, Shockey lost a fumble that led to Jonathan Stewart's 18-yard TD run in his first game back from hernia surgery. The Saints fell to the Panthers 30-7.

Buffalo backup linebacker John DiGiorgio hurt his right knee in Buffalo's 23-14 win over San Diego. DiGiorgio, a special teams standout, was injured on a punt return late in the second quarter. He was carted off the field, unable to put any weight on his right leg.

Also, Bills starting right guard Brad Butler strained his left knee early on and returned briefly, but ultimately was unable to finish.

Dolphins nose tackle Jason Ferguson left the game in the first quarter with a rib injury and didn't return.