Colon came back after a two-game absence, but hurt his knee quickly against the San Diego Chargers. He'll likely be out for the rest of the season, according to reports after the game. With Mike Adams and Marcus Gilbert already out at right tackle, the team has been playing a reconfigured line with Kelvin Beachum at tackle, center Maurkice Pouncey at left guard and backup Doug Legursky at center. It hasn't been particularly effective, as Ben Roethlisberger didn't have a ton of time to throw Sunday and Jonathan Dwyer was ineffective at running back when called upon. But it's the best the Steelers have for now. David DeCastro could make his NFL debut soon after being added to the active roster for Week 13, but the first-round draft pick still has yet to play. His return would allow Pouncey to move back to the center spot, where he's one of the league's best.
LaMarr Woodley is still considered questionable with a left ankle injury after missing two games. It's unclear whether the linebacker plans on playing Sunday against the Dallas Cowboys. Ike Taylor was ruled out for at least two weeks after breaking his ankle, Sunday's game will be the second of those two weeks, although the injury could keep him out for longer.
Roethlisberger showed no signs of lingering injury after his rib injury kept him out for three games. Byron Leftwich still would not be able to go if the team needed a backup, as he is considered questionable going forward.