The Lions placed Mahogany (undisclosed) on the active/non-football injury list Tuesday.
It's unclear what the injury is, when Mahogany picked it up and how severe it is. He'll be eligible to participate in practice once he's fully recovered from it, but in his absence, the likes of Juice Scruggs, Miles Frazier and Ben Bartch will have the chance to work with the first-team offense at left guard.