49ers add Driskel

NFL Network's Ian Rapoport reports that the Lions are placing QB Jeff Driskel on IR with his hamstring injury. That keeps David Blough in place as the fill-in for as long as Matthew Stafford remains out with his back injury. Detroit has also signed QB Kyle Sloter off Arizona's practice squad.

Lions QB Jeff Driskel (hamstring) is listed as questionable for Thursday's game against the Bears. He was limited in practice all week. Even if Driskel suits up for this one, there's a good chance that his rushing ability is curtailed. He's just a low-end QB2 for Week 13. Detroit will be forced to turn to QB David Blough if Driskel is out.

Lions QB Jeff Driskel has been limited in practice so far this week with a sore hamstring, HC Matt Patricia said Tuesday. We'll see what Driskel is able to do tomorrow and how Detroit lists him for Thursday's game against the Bears. If he's unable to play, the Lions would be down to QB David Blough.