KANSAS CITY, Mo. — Running back Joe McKnight has ruptured his Achilles tendon, becoming the third Chiefs player to sustain the season-ending injury already this season.

McKnight, a former John Curtis standout, sustained the injury in practice Thursday. Defensive tackle Mike DeVito and linebacker Derrick Johnson sustained the same injury in a Week 1 loss to Tennessee.

Kansas City plays the New England Patriots on Monday night.

McKnight has been plagued by injuries dating to his days at Southern California, and he never could stay healthy with the New York Jets. He spent last season out of the NFL entirely.

He seemed to be making the most of a second chance in Kansas City, though. McKnight caught six passes for 64 yards and a pair of touchdowns in a 34-15 win last Sunday in Miami.

Fines

EAGLES’ PETERS, REDSKINS’ BAKER FINED FOR BRAWL: In New York, Philadelphia Eagles left tackle Jason Peters was fined $10,000 by the NFL on Friday and Washington Redskins nose tackle Chris Baker $8,268 for their roles in a brawl between the teams last Sunday.

The fight began after Baker laid out Philadelphia quarterback Nick Foles with a blindside hit on an apparent interception in the fourth quarter.

Peters’ fine was for unnecessarily striking an opponent in the head area after the play was over. Baker’s was for grabbing an opponent by the facemask.

Buffalo receiver Mike Williams was docked $11,025 for violating the NFL’s dress code. He wore red socks instead of blue like his teammates.

Bills linebacker Brandon Spikes and San Francisco wide receiver Anquan Boldin were each fined $8,268 for unnecessarily head-butting an opponent. Pittsburgh running back LeGarrette Blount was fined $5,000 for throwing the ball into the stands after his touchdown last week against Carolina.

Lions

STAFFORD STOPPED BY FALLEN BRIDGE: In Allen Park, Mich., Detroit quarterback Matthew Stafford said he was shocked to see a fallen pedestrian bridge across a freeway as he was heading to the team’s suburban practice facility.

Stafford told reporters Friday in the crash site was something “you don’t expect to see ... when you’re driving to work.”

He was among the first motorists to stop after the boom on a trash-hauling truck struck and pulled down the bridge about 6 a.m. on the Southfield Freeway. The truck’s driver later died.

The Lions security director also was on his way to work. He stopped on the freeway’s service drive and let Stafford use his car. He later drove the quarterback’s vehicle away.

The Lions are preparing for Sunday’s game road game against the New York Jets.

Off the field

Attorneys for Dallas Cowboys owner Jerry Jones argued that Oklahoma woman waited too long to file a lawsuit accusing him of sexual assault. State District Judge Dale Tillery did not immediately rule Friday on whether a Texas statute of limitations prevents Jana Weckerly’s lawsuit from proceeding. ... U.S. District Judge David Doty, who had been the arbiter of NFL labor matters for more than two decades, recused himself Friday from ruling on a dispute between NFL owners and the players’ union over an alleged secret salary cap.