Stafford is now considered week-to-week with an injury that one source said could sideline him for "this week or 3 weeks". Jeff Driskel, the former San Francisco 49ers draft pick who Detroit signed in mid-September, is expected to make the start against Chicago.
Driskel, the subject of interest from at least one team at last month's trade deadline, made five starts for the Cincinnati Bengals past year, completing 59.7% of his passes and throwing six touchdown passes against two interceptions.
Ryan's streak of 154 consecutive starts came to an end last month because of an ankle injury. Practiced on limited all week, listed him as questionable.
What is Matthew Stafford's injury?
The Lions have listed Stafford on their injury report as questionable five times going back to last season, including twice this year - once before the game against the Chiefs in Week 4, and this week.
Matthew Stafford has been healthy throughout the season.
The hits just keep coming for the Detroit Lions. Yet in the week leading up to the Bears game, Stafford was practicing through the pain and telling reporters he was fine.
Stafford downplayed the extent of his current injury Wednesday, when he said he planned to play against the Bears.
"I'll be good to go", Stafford said. I'm not really anxious about it.
November 9: ESPN reports Stafford is being told not to play against the Bears, but the QB wants to play through the pain of the back injury.