Left tackle Trent Williams was full-go in Friday's practice and he should be available to play in Sunday's game against the Indianapolis Colts.

However, the team listed him as questionable on the official injury report, so there remains some doubt about his availability.

Williams suffered a knee injury in last week's game vs. Green Bay. An MRI revealed no structural damage.

He sat out practice on Wednesday but was able to participate in the team's jog-through session on Thursday.

Friday's practice was thought to be a significant test of the stability of Williams' knee.

"It didn't look like there were any setbacks, and he should be ready to go," head coach Mike Shanahan said.

Williams has surprised even himself with how fast he recovered from the injury.

"[The injury] looked nasty," he said. "It kind of gave me chills. I'm glad it was something minor and not major."

-- MCINTOSH'S STATUS UNCERTAIN

Rocky McIntosh missed practice for the third consecutive day on Friday as he continues to recuperate from a concussion.

He is officially listed as questionable for Sunday's game vs. Indianapolis.

McIntosh has been evaluated by several concussion specialists this week, Mike Shanahan said.

"He did talk to a doctor [Friday] morning," Shanahan said. "He's going to see a neural doctor sometime later on tomorrow or Sunday. Obviously right before the game we'll get a final evaluation of where he's at.

"He got a good working [Friday] morning, which is good. He had good running, good weightlifting, so that was a good sign."

If McIntosh is unable to play, then the Redskins could start either H.B. Blades or rookie Perry Riley in his place.