Bagent was diagnosed with a concussion and placed in the five-step protocol Tuesday, Ian Rapoport of NFL Network reports.
With Caleb Williams viewed as week-to-week after suffering a hamstring injury in the Bears' Week 2 loss to the Vikings, Bagent was the leading candidate to start Monday against the Eagles. However, his availability for Week 3 is suddenly up in the air. Third-stringer Case Keenum is left as the only healthy quarterback on the roster and would start against the Eagles if neither Williams nor Bagent is cleared to play.