Chase Daniel threw for 195 yards and a touchdown after Trubisky exited with a left shoulder injury, and Chicago swarmed NFL rushing leader Dalvin Cook in a 16-6 victory over the Minnesota Vikings on Sunday.
Things weren't looking so good for the Bears (3-1) when Trubisky went down in the opening minutes.
The No. 2 overall pick in the 2017 draft, he was scrambling on the sixth play from scrimmage when Danielle Hunter dragged him down. The quarterback's non-throwing arm got pinned awkwardly under his body as the ball popped out. Minnesota made the recovery, but a holding penalty against Anthony Harris negated the play.
Trubisky headed to the sideline and walked to the locker room a few minutes later. Nagy said he wasn't sure of the extent of the injury.
Daniel came on and connected with Tarik Cohen on a 10-yard touchdown to complete a 14-play drive. The 10th-year pro completed 22 of 30 passes.
Allen Robinson had seven catches for 77 yards. Nick Williams had two sacks. Khalil Mack and Roy Robertson-Harris each had 1 1/2.