Washington quarterback Patrick Ramsey has been playing all season with a broken bone in his right foot.
"It's flared up pretty bad recently," said Ramsey, who has had difficulty planting the foot when throwing. "It's just something I'm trying to fight through."
Coach Steve Spurrier revealed the injury Monday, a day after Ramsey had one of his worst games this season in the Redskins' 20-17 loss at Carolina.
Ramsey said the foot started hurting during training camp. An X-ray disclosed an old fracture. Ramsey has no idea when or how it happened.
"It never hurt me last season. It never hurt me in college," Ramsey said. "But at some point, I apparently fractured my foot. I know that sounds odd."
Houston quarterback David Carr will sit out at least one game and perhaps more because of a sprained right shoulder.
Veteran Tony Banks will start against New England on Sunday.
Carr was injured late in the first quarter of the Texans' 12-10 victory at Buffalo when linebacker Jeff Posey drove Carr's throwing shoulder into the turf on a sack.
An MRI exam revealed that Tennessee end Jevon Kearse has a high sprain of his left ankle, good news for the Titans because he heard clicking in the joint after being hurt in the team's 10-3 victory over Jacksonville.
"We're going to have to treat him very aggressively," Coach Jeff Fisher said. "It's way too early to speculate on whether he'll be able to play [Sunday]."
Detroit put receiver Scotty Anderson, who leads the team with 325 yards receiving, on the injured reserve list because of a high ankle sprain suffered in the Lions' 35-14 loss at Seattle. It had not been decided whether he would need surgery.
San Diego receiver Tim Dwight remained hospitalized in Denver because of a partially collapsed lung suffered in the Chargers' 37-8 loss to the Broncos.
Coach Marty Schottenheimer said Dwight is expected to return today to San Diego.
Schottenheimer didn't know Dwight's long-term prognosis. Dwight suffered a collapsed lung in 2001 and sat out six games.
Minnesota rookie defensive tackle Kevin Williams was arrested on a drunken driving charge, police said.
The Vikings' first-round choice in the 2003 draft was arrested by police at Edina, Minn., about midnight Thursday.
Police said Williams registered 0.14% on a blood-alcohol test and was issued a tab charge for fourth-degree driving while intoxicated. Minnesota's legal limit is 0.10%.
On a tab charge, a driver normally is given a ticket and a court date and released to a sober adult without going to jail, police said.