Tyler Polumbus (Jonathan Newton/The Washington Post)

Starting right tackle Tyler Polumbus was cleared to practice today as he recovers from the concussion he suffered two weeks ago, and he remains questionable for Sunday.

Polumbus could have practiced fully, Coach Mike Shanahan said, but the Redskins split his reps with backup Maurice Hurt in case Polumbus suffers a setback between now and Sunday night’s showdown against the Cowboys.

“You want to see how he reacts, how he practiced today on film,” Shanahan said. “We’ll see how he feels tomorrow. I think that’s the key. When he did practice today, he looked pretty good. That’s a good sign.”

Polumbus was limited in Thursday’s practice, too. In the early portion of practices this week, he has lined up with the first-string offensive line. For his part, Polumbus believes he’ll play.

“I’m right on track to be where I want to be Sunday,” Polumbus said.

After starting the first 14 games, Polumbus missed last week with the concussion. Redskins coaches said Hurt graded out well against the Eagles, but he seemed to whiff on a few blocks on running plays. This week, the Redskins’ right tackle will likely be matched up against outside linebacker Anthony Spencer, who has 10 sacks this year.

“It’s a setback like any injury,” Polumbus said. “It’s my first concussion, so I didn’t necessarily know what to expect. It’s just something you fight through like any other injury and try to get back as quick as you can.”

Safety DeJon Gomes was also limited in practice today, Shanahan said. Gomes suffered a second-degree medical collateral ligament strain last week and is listed as questionable for Sunday night.