Brett Favre hobbled off the field, leaving the Green Bay Packers to wonder how long they might be without their star quarterback.
Favre, who started for the 164th consecutive time Sunday, sprained his left knee when he was sacked by LaVar Arrington in Green Bay's 30-9 victory over the Washington Redskins.
The Pro Bowl quarterback came out in the third quarter, was carted off the sideline and did not return. There was no immediate word on the severity of his injury.
Ahman Green had the first three-touchdown rushing performance of his career, helping the Packers (6-1) to their fifth straight victory.
Green ran for 88 yards on 24 carries and scored on runs of 24, 2 and 8 yards, the last one following Redskins quarterback Patrick Ramsey's fifth sack and third fumble, which was recovered by Rod Walker at the Washington 23 in the fourth quarter.
In his second career start, Ramsey overthrew his targets all afternoon and the Redskins (2-4) managed just three field goals by James Tuthill. Ramsey was 10-of-24 for 135 yards. He was sacked six times.
Backup Doug Pederson replaced Favre, the NFC's leading passer at age 33, who was carted off the sideline to a standing ovation from the record crowd of 63,363 at Lambeau Field.
Favre finished 11-for-14 for 89 yards and left with Green Bay ahead 17-6. Pederson was 9-of-15 for 78 yards, leading the Packers to two field goals and one touchdown in five series.
Favre, the league's only three-time MVP, entered leading the NFC in passer rating (102.5), yards passing (1,617) and touchdown passes (14). He was playing in his 166th straight game, including 164 consecutive starts, an NFL record for quarterbacks and the longest current streak in the league at any position.
This was just the fourth time during the streak that Favre didn't complete the game because of injury. He was hurt against Minnesota in 1994 and '95, and against Tampa Bay in 2000.
He returned the following week to keep his streak alive. The Packers are off next week and don't play again until Nov. 4 against Miami.
Ryan Longwell made it 20-9 with 9:21 remaining on a 41-yard field goal after Todd Franz recovered Kevin Lockett's fumble in Washington territory.
The officials called 17 penalties totaling 174 yards in the first half, including eight for 99 yards against Washington.
Green Bay's second touchdown drive was aided by a double penalty on cornerback Fred Smoot, who was flagged 36 yards for pass interference on Donald Driver and another 4 for a personal foul for grabbing Driver by his facemask - Darrell Green also held on the play, but that penalty was declined.
The result was a first-and-goal, and two plays later Green scored from 2 yards out for a 14-6 lead.
After the Redskins failed to convert a fourth down at midfield, Longwell gave Green Bay a 17-6 halftime lead with a 36-yard field goal.
Longwell didn't get to try a 43-yarder earlier when Rob Davis' snap was high and Pederson, the holder, tossed an incompletion downfield.
The Redskins then capitalized on three Packers penalties during a 12-play drive that ended with Tuthill's 53-yard field goal that pulled Washington to 7-6.
The infractions included an illegal contact call on cornerback Tod McBride, starting for Mike McKenzie (groin), that negated Matt Bowen's interception, and a personal foul on a third-down incompletion in which rookie Marques Anderson, starting for Darren Sharper (hamstring), hit Ramsey in the head.
-- Associated Press