Redskins Coach Mike Shanahan said safety LaRon Landry (groin), linebacker London Fletcher (ankle), fullback Darrel Young (concussion), and defensive end Stephen Bowen (knee) did not practice because of injuries Wednesday.

Linebacker Brian Orakpo (shoulder), offensive tackle Jammal Brown (hip) and receover Niles Paul (toe) were limited in practice.

No players have been ruled out for this week’s game, Shanahan said in his daily briefing.

Shanahan said the biggest area of improvement for running back Roy Helu has been pass protection. Shanahan said pass protection is more complicated for running backs in Washington’s scheme than in other offenses, but the rookie has done well picking it up.

The coach said linebacker Perry Riley continues to improve and that the number of mental errors he makes has been declining. Nose tackle Barry Cofield also continues to become more skilled as he plays his first season in the 3-4 defense, said Shanahan, who called Cofield a student of the game.

Shanahan said quarterback Rex Grossman seems more confident now than he was earlier this season.

Shanahan said the Redskins faced the possibility of losing cornerback Brandyn Thompson to another team, so they promoted him to the 53-man roster.