Muzzin (undisclosed) will remain on the shelf heading into Thursday's clash with Tampa Bay, David Alter of The Hockey News reports.
Muzzin is traveling with the Leafs for their three-game road trip, so he could be back in action sooner rather than later. In his last four outings, the 33-year-old defenseman has tallied one goal, one assist and 11 shots while averaging 18:42 of ice time. Once cleared to play, Muzzin figures to relegate Timothy Liljegren to a spot in the press box.