Head coach Dan Campbell said Tuesday that he expects to have Montgomery (knee) available for the Lions' first playoff game in the divisional round, Justin Rogers of DetroitFootball.net reports.
It is a low-impact inactives list for the Cowboys in Week 18. Dallas has been eliminated from playoff contention and will look to impact the Commanders' playoff seeding with a win this week. Grier will serve as the emergency third quarterback, having just been signed to the active roster this past week.