Pittsburgh quarterback Ben Roethlisberger was apparently knocked momentarily unconscious and left the team's game against Atlanta after being hit by three Falcons defenders while throwing a pass in the third quarter.

Chad Brown, a Pro Bowl linebacker for Pittsburgh 10 years ago, was signed Thursday by the Steelers to add depth and experience at what suddenly has become a depleted position.

Pittsburgh Steelers cornerback Ricardo Colclough will miss the rest of the season because of a neck injury.