PITTSBURGH — The Pittsburgh Steelers apparently won't be without injured safety Troy Polamalu for more than one game.

The sigh of relief began in coach Mike Tomlin's office and no doubt spread throughout the Steelers' practice building.

Polamalu hasn't been ruled out of Sunday's game at Kansas City despite injuring his left knee for the second time this season. However, it seems more likely he will miss one game and attempt to return for an AFC North game at Baltimore on Nov. 29.

Polamalu is "questionable at best" for the Chiefs (2-7), according to Tomlin.

Questionable is a lot better than out, which is what the Steelers (6-3) feared their defensive star would be after he strained a posterior cruciate ligament tackling running back Cedric Benson early in Cincinnati's 18-12 victory on Sunday.

"He is in a great frame of mind. He feels really good, but we're going to follow the expert advice that we get from our medical staff in terms of how we proceed," Tomlin said Tuesday. "In the short term, we're going to take it day to day. But (it's) really encouraging, more encouraging, I think, than was initially anticipated."

Polamalu, a five-time Pro Bowl player, missed the Steelers' second through fifth games with a medial collateral ligament sprain, and he played less than a half in their opener against Tennessee. The Steelers (6-3) lost two of the four he missed, and all three of their losses occurred when Polamalu was out or played only a single series.

The latest injury is not as bad as initially feared, Tomlin said, because it did not affect the previously injured ligament.