ASHBURN, Va. — Washington Redskins linebacker Brian Orakpo will miss the rest of the season because he needs surgery on a torn right pectoral muscle.

“The production may not be where people think it should be, but he’s still been playing very good against the run and been disruptive in the passing game,” coach Jay Gruden said Monday. “That’ll be a big loss.”

Orakpo, a three-time Pro Bowl selection, was hurt trying to make a tackle on a running play early in the fourth quarter of Washington’s 19-17 victory over the Tennessee Titans on Sunday.

Orakpo twice has torn the pectoral muscle near his left shoulder in the past, including in Week 2 of the 2012 season.

He had a half-sack for the Redskins (2-5) this season.

Rookie linebacker Trent Murphy, a second-round pick out of Stanford, will start in Orakpo’s spot.

49ers

center Kilgore SET FOR SEASON-ENDING surgery: In Santga Clara, California, San Francisco 49ers center Daniel Kilgore is scheduled to undergo season-ending surgery Tuesday for a fractured left ankle sustained in the third quarter of Sunday night’s loss at Denver.

Coach Jim Harbaugh says the injury is similar to what nose tackle Ian Williams suffered in Week 2 of the 2013 season at Seattle that required four operations and kept him sidelined until training camp. Kilgore was hurt when linebacker Brandon Marshall inadvertently ran into his lower leg at the end of a run by Frank Gore.

Marcus Martin a third-round draft pick, is the favorite to fill in for Kilgore on the starting offensive line.

Falcons

center Konz OUT FOR SEASON: In Atlanta, the Atlanta Falcons placed center Peter Konz on injured reserve with a left knee injury on Monday, dealing their another blow to their battered offensive line.

Konz is Atlanta’s fourth starting offensive lineman to suffer a season-ending injury.

Konz replaced Joe Hawley after Hawley and right tackle Lamar Holmes suffered season-ending injuries in a loss at Minnesota on Sept. 28. Left tackle Sam Baker was lost for the year in a preseason game.

Konz hurt his knee in the Falcons’ 29-7 loss at Baltimore on Sunday. Rookie James Stone, who signed with the team an undrafted free agent took over for Konz.

Vikings

Injured Sullivan, Ducasse to be evaluated: In Eden Prairie, Minn., Minnesota is having injury trouble in the middle of their offensive line.

Center John Sullivan and right guard Vlad Ducasse were hurt on the same play Sunday in the first quarter at Buffalo, and neither returned to the game. Sullivan suffered a concussion. Ducasse hurt his knee. Coach Mike Zimmer said Monday the team will learn more about their status as the week progresses.

Ducasse was already filling in for Brandon Fusco, whose season is over because of a torn pectoral muscle. Backup tackle Mike Harris replaced Ducasse at guard and Joe Berger stepped in for Sullivan at center.

Rams

WIDE RECEIVERS Pettis, BLAKE RELEASED: In St. Louis, the St. Louis Rams released wide receiver Austin Pettis, citing roster concerns elsewhere.

Pettis was inactive for Sunday’s victory over the Seattle Seahawks.

He caught 12 passes for 118 yards and one touchdown this season. He made 11 starts in four seasons with the Rams.

The Rams also released wide receiver Emory Blake from the practice squad.

Raiders

REPORT: YOUNG SUFFERS KNEE INJURY: In Alameda, California, as if the Oakland Raiders’ defensive problems weren’t bad enough, another injury will force them to use a third-stringer at strong safety.

Usama Young left Sunday’s 24-13 loss to Arizona with a significant injury to his left knee. He underwent an MRI on Monday and ESPN reported that he has a torn ACL and MCL in the knee.

and will miss the rest of the season.

With starter Tyvon Branch already out for the season with a broken foot, the Raiders (0-6) once again are forced to turn back to Brandian Ross, who struggled in that role last year after Branch got hurt.