There’s nothing official yet on defensive end Adam Carriker, but his teammates have braced for the worst.

“He’s going to be done, I guess, for the rest of the year. We’ll miss him,” Redskins linebacker London Fletcher said.

Carriker suffered an injury to his right leg on the second play from scrimmage and spent the rest of the game on crutches. Even after the 31-28 loss at St. Louis coach Mike Shanahan said “it didn’t look good” and that he anticipated surgery for Carriker. Shanahan will address the media at 3 p.m. Monday.

Carriker hasn’t been a flashy player for Washington, but he has been a solid one. He posted a career-best 5.5 sacks in 2011, but his value was more as a player who understands his role and played the run well. Kedric Golston replaced him and second-year Jarvis Jenkins likely will get more time in Carriker’s absence as well.

Meanwhile, linebacker Rob Jackson said after talking to teammate Brian Orakpo that he doesn’t think the veteran will play Sunday. Orakpo missed much of Sunday’s game when he re-injured his left pectoral muscle. Orakpo hurt the same muscle in the 2011 finale as well as in the second preseason game.

“Me and Chris Wilson are expecting to play a lot,” Jackson said of his fellow reserve.

Shanahan will address that situation later as well.

Meanwhile safety Brandon Meriweather, who missed the first two games with a sprained knee, said, “I’m better than last week.” But it’s uncertain as to his status.