This article was originally published on www.si.com as Sean McVay Unsure of Extent of Matthew Stafford's Lingering Back Injury.

Just as he did last week, Matthew Stafford will work out before the Rams' preseason game in hopes of his back responding better this time.

Matthew Stafford’s back injury recovery is going to be put to the test. Rams coach Sean McVay told reporters Thursday that Stafford, who is battling an aggravated disk, will participate in workouts Saturday morning. The quarterback was not a part of practice on Wednesday or the Rams’ joint practice with the Saints on Thursday.