The Redskins placed linebacker Marcus Washington on injured reserve on Saturday, ending his season.
Washington suffered a knee injury in last week's 16-10 win over New Orleans and had been declared out out for this Sunday's game against the St. Louis Rams.
Taking Washington's place on the 53-man roster is running back Nehemiah Broughton, who has spent most of the 2006 season on the Redskins' practice squad.
Broughton is in his second NFL season after being selected by the Redskins in the seventh round of the 2005 NFL Draft from The Citadel.
After Washington missed three days of practice last week, head coach Joe Gibbs indicated that it might be best for Washington to sit out the Redskins' last two games.
"He didn't take work at all [last week] and I think we took a real hard look at that," Gibbs said. "We had another discussion about what's best for him, so we'll see what happens. He won't play this week and we'll see what's best for him here with his situation."
Assistant head coach-defense Gregg Williams could employ any number of defensive packages that include veterans Jeff Posey and Warrick Holdman, as well as rookie Rocky McIntosh, who saw his first significant action at weak-side linebacker last Sunday.
Since becoming a regular NFL starter in 2000, Washington has missed just one game. That was in 2002 when he was sidelined with a knee injury.
Regarded as a high-energy player, Washington signed with the Redskins in March 2004 and has started 48 consecutive games in the burgundy and gold.
"What concerns you on losing him is the energy he brings to us," Gibbs said. "A lot of our players feed off that. So we'll play a game for the first time without him and that's a big deal. We'll have to have some guys step up, play great and provide the energy and enthusiasm that he does."
Washington finishes the season ranked second on the team in tackles with 106 stops (78 solo), 2.5 sacks, two forced fumbles, two fumble recoveries and 11 passes defended.
Said Washington: "It's going to be kind of strange to be on the sidelines watching the guys. I haven't missed a game in a while. I'll keep the guys up."