Bears linebacker Roquan Smith suffered a pectoral injury on the Cowboys' opening drive Thursday night and has been ruled out for the remainder of the game.
After Dallas capped off an impressive 17-play, 75-yard touchdown drive, accounting for the first 8:57 of the game, Smith exited the field and went into the locker room.
The Bears are playing without two of their inside linebackers. Danny Trevathan has missed the last four games with an elbow injury. Kevin Pierre-Louis took over for Smith and is playing alongside Nick Kwiatkoski, who's starting in place of Trevathan.
Smith, who was drafted eighth overall by the Bears in 2018, set a career-high with 15 total tackles last week in Chicago's win over Detroit on Thanksgiving.