The Detroit Lions are already down their No. 1 quarterback in Matthew Stafford. Now, they might be down their primary backup.

Lions head coach Matt Patricia said that backup signal-caller Jeff Driskel’s hamstring is still “pretty sore,” per Josh Alper of Pro Football Talk. Driskel was estimated as limited in practice on Monday, and the same listing is expected to occur on Tuesday.

Driskel initially sustained the hamstring injury during his team’s loss to the Washington Redskins this past Sunday.

Patricia added that fellow backup quarterback David Blough would get in some work with the first team in practice on Tuesday in case Driskel is unable to go against the Chicago Bears on Thanksgiving Day.

Driskel has started the last three games for Detroit due to Stafford’s back injury. During that time, he has thrown for 685 yards, four touchdowns and four interceptions while completing 59 percent of his passes and posting a passer rating of 75.3.

Live and breathe the NFL?

🚨 Get viral NFL graphics, memes, rumors and trending news delivered right to your inbox with the Clutch Newsletter.

The 26-year-old, who played his collegiate football at the University of Florida and Louisiana Tech, was originally selected by the San Francisco 49ers in the sixth round (207th pick overall) of the 2016 NFL Draft.

However, Driskel never actually played in a regular-season game for the 49ers before being waived in September 2016. He signed with the Cincinnati Bengals, where he resided from 2016 through 2018, making five starts for the Bengals last season.

He was then waived by Cincinnati this past September, and shortly after, he linked up with the Lions.

Detroit has lost four games in a row and is just 3-7-1 on the season.