The Washington Times - December 17, 2012, 03:41PM

Right tackle suddenly is a major issue for the Redskins. Starter Tyler Polumbus suffered a concussion on Sunday, and the NFL on Monday suspended second-stringer Jordan Black four games for violating the league’s policy on performance-enhancing drugs.

Depending on Polumbus’ availability for Sunday’s game at Philadelphia, Washington might have to start second-year utility lineman Maurice Hurt or sixth-round rookie Tom Compton.

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Polumbus is subject to the NFL’s return-to-play protocol. He must be asymptomatic in order to practice on Wednesday, and he must remain asymptomatic to play against the Eagles.

Black replaced Polumbus in the second half of Sunday’s win over Cleveland. He played 43 of 75 offensive snaps, according to the NFL.

The Redskins brought him back from the cusp of retirement in July when Jammal Brown first aggravated his left hip injury. Black, 32, spent 2011 out of football. He played in every game this season, all but two exclusively on the placekicking protection unit.

Black is the sixth Redskin in the last two seasons to be suspended for violating one of the league’s drug policies. He follows Phillip Buchanon, Trent Williams, Fred Davis, Tanard Jackson and Cedric Griffin.

Black is suspended without pay. Any postseason games this season would count toward the four-game total.

Mike Shanahan did not comment on the suspension Monday because the team publicized it after Shanahan’s press conference concluded.

The center position also is a concern for Washington because Will Montgomery injured the medial collateral ligament in his left knee and injured his right arm against Cleveland. Shanahan would not discuss details of Montgomery’s injury or the prognosis. He insisted on waiting until Wednesday to do so but would not explain why.