Chicago Bears linebacker Roquan Smith left Thursday night's game against the Dallas Cowboys with a pectoral injury and was ruled out by the team.
Smith was injured during the first quarter and headed to the locker room for evaluation.
The second-year-pro entered the game with 98 tackles, two sacks and one interception.
The Bears were already without Danny Trevathan, who sat out his fourth straight game with a left elbow injury. Nick Kwiatkoski started in Trevathan's place, and Kevin Pierre-Louis entered to replace Smith.
Chicago's defense was also without defensive tackle Akiem Hicks and cornerback Prince Amukamara entering the game.
--Field Level Media