PITTSBURGH -- Steelers safety Troy Polamalu wore a heavy brace on his reinjured left knee while watching practice Wednesday and did not take part in any drills.
Polamalu limped off the field about 30 minutes before practice ended and did not answer questions. He is all but certain to miss Sunday's game at Kansas City, and he might not be ready for Baltimore on Nov. 29.
Polamalu injured a knee ligament while tackling Cincinnati's Cedric Benson on Sunday. He missed four games after hurting a different ligament during Pittsburgh's opener.
Polamalu was injured in the first half of two of those five starts.