Mack (foot) was a non-participant at Thursday's practice.
The 30-year-old was inactive for what was the Bears' first practice of the week, prior to meeting the Steelers on Monday night. Mack's absence comes as no surprise, as he has appeared on the injury report for many weeks now with the nagging foot injury. He missed the team's Week 8 matchup with the 49ers, his first missed contest of the year, and his status is worth monitoring in the coming days. If he can't go on MNF, Trevis Gipson will once again see an increased role on defense.