PITTSBURGH (AP) - Kansas City Chiefs quarterback Brady Quinn is inactive for Monday night's game against the Pittsburgh Steelers, the second straight game he will miss due to a concussion.

Matt Cassel will start for the Chiefs and Ricky Stanzi will be the backup. Wide receiver Steve Breaston is also inactive for Kansas City.

The Steelers made safety Troy Polamalu inactive for the fifth straight game due to a right calf injury. Wide receiver Antonio Brown also is out after injuring his ankle in last week's victory over the New York Giants.

Running back Rashard Mendenhall, who hasn't played since straining his right Achilles tendon against Tennessee on Oct. 11, right tackle Marcus Gilbert (ankle) and linebacker Stevenson Sylvester (hamstring) also are on Pittsburgh's inactive list.

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