Brandon Thompson is done for the season.
The fourth-year defensive tackle was placed on injured reserve Wednesday afternoon with a knee injury, ending his season.
Thompson played in three games this season, registering one tackle. It's the second season in a row he has not been able to play the full year.
He played above-average run defense in 11 games last season, missing Games 3-7 with a knee injury. He also played in the Wild Card playoff game, but not this year. The Bengals host Pittsburgh in Saturday's Wild Card playoff.
Injuries and the depth chart seem to be holding back Thompson, who started seven games at defensive tackle in 2013 as the injury replacement for All-Pro Geno Atkins.
Thompson is the fifth Bengal to wind up on injured reserve, three coming after the start of the season. He joins cornerback Darqueze Dennard, linebackers Emmanuel Lamur and Marquis Flowers, and wide receiver James Wright.
Called up from the practice squad to replace Thompson was rookie defensive tackle DeShawn Williams. Williams is a college free-agent signee out of Clemson. He has compiled no NFL stats.
Also on the injury front, Bengals quarterback Andy Dalton (broken thumb) did not practice Wednesday. Although the team has yet to make it official, it's unlikely that Dalton plays Saturday against the Steelers. He had the cast removed from his right throwing hand on Tuesday.
Bengals coach Marvin Lewis already has suggested that backup QB A.J. McCarron will get another start.
H-Back Ryan Hewitt has not returned to practice after injuring his knee against Denver.