The Pittsburgh Steelers have ruled out wide receiver Antonio Brown, tackle Marcus Gilbert, safety Troy Polamalu and linebacker Stevenson Sylvester for Monday night's game against the Kansas City Chiefs.

Brown hurt his left ankle during the first quarter of last Sunday's 24-20 victory over the New York Giants.

He leads Pittsburgh with 42 catches this season and has totaled 499 receiving yards with one touchdown through the first eight games. The third-year pro posted career highs of 69 receptions and 1,108 yards during a breakout campaign in 2011.

Polamalu has not played since Week 5 due to a calf injury. Gilbert will miss a fourth straight outing with an ankle sprain, while Sylvester remains out with a hamstring injury.

Running back Rashard Mendenhall (Achilles) is doubtful, while linebacker Chris Carter (abdomen) is questionable. Mendenhall will likely miss his fourth straight contest,