Marcus Washington is expected to be sidelined for this week's game against the Seattle Seahawks due to a high ankle sprain.
"He's the guy that I'm concerned about," head coach Jim Zorn said. "[The injury] is going to keep him out more than a week."
Team officials were still evaluating Washington's injury on Monday. The severity of the sprain would determine how much time Washington would be out, Zorn said.
Washington suffered the injury in the second quarter of the 14-10 loss to the Dallas Cowboys on Sunday.
He was carted off the field and headed into the locker room for X-rays, which were negative.
Washington was replaced in the lineup by H.B. Blades, who finished the game with five tackles.
Blades would likely draw the start at strong-side linebacker if Washington can't go against Seattle.
It has been an injury plagued season for Washington. He struggled through a hamstring injury early in the season--missing two games--and then was hampered by a shoulder injury entering the Dallas game.
For the season, Washington has 36 tackles and one forced fumble.
-- PORTIS 'BETTER THIS WEEK'
Clinton Portis, who played through a sprained knee on Sunday vs. Dallas, is expected to be available for practice this week, Jim Zorn said.
Portis missed practice all last week and was a game time decision heading into the Dallas game.
"I think Clinton is better this week at the end of [the Dallas game] then he was after the last game," Zorn said. "He is still going to get treatment, but he'll practice at some point."
Portis got off to a strong start against Dallas, picking up 29 yards on the Redskins' opening drive. He finished with 68 yards on 15 carries.
"I felt like Clinton started out very strong," Zorn said. "We didn't know how long he would last. He fought all the way. I think he did start to wear down a little bit. I don't know if it was conditioning or if his leg started hurting, but he would come out."
Portis remains the NFL's second-leading rusher with 1,063 yards on 215 carries. He trails only Minnesota's Adrian Peterson, who has 1,100 yards on 225 carries.
-- ROTATION AT DEFENSIVE END?
Demetric Evans and Jason Taylor alternated at defensive end during Sunday's game against Dallas.
Evans, regarded as a solid run-stopper, started the game. Taylor replaced him on pass-rushing downs.
Taylor is being eased back into the lineup as he returns from a calf injury.
"We're trying to keep guys fresh," Jim Zorn said. "With Jason's lack of conditioning right now, it is about his ratio of plays. I can't predict if [the rotation continues] because some of it has to do with how quick [Taylor] is getting off the ball and how explosive he is."
Zorn said the team has no plans to play Taylor at linebacker as Marcus Washington rehabs a high ankle sprain.
-- STATUS ON BETTS, RANDLE EL
Ladell Betts re-aggravated his knee injury in the second half of Sunday's game and did not return to the game.
Betts suffered the injury on a screen pass that he converted into a 20-yard gain. He was last seen noticeably limping on the sidelines, trying to walk off the injury.
"Ladell is banged up a little bit, but not so much that he's going to [miss a game]," Zorn said. "I think he's okay."
Antwaan Randle El suffered a low ankle sprain in the second half against Dallas.
Zorn indicated that Randle El's injury was not serious enough for him to miss significant time.