Jack won't return to Sunday's game in Baltimore due to a groin injury.
Jack didn't suit up Week 15 at Carolina because of a groin issue, which limited him to just 29 percent of the defensive snaps Week 16 against the Raiders. It also impacted his practice reps during Week 17 prep, but he attempted to play through it before being ruled out in the third quarter Sunday. Jack's status thus will be worth watching as the Steelers prepare for their regular-season finale versus the Browns.