The Steelers today placed guard Willie Colon on injured reserve, ending his season.
Colon’s knee was injured a second time Dec. 9 in a game against San Diego and required surgery, after he missed the previous two games with the injury.
The move opens a spot for Rashard Mendenhall, who was reinstated on Monday after a one-week suspension. The Steelers had a roster exemption until 4 p.m. today for him.
Colon has wound up on injured reserve in each of the past three seasons. He missed the entire 2010 season with an achilles injury. An arm injury in the 2011 opener ended that season for him.