Muzzin will not participate in the first week of camp due to back discomfort, reports Sports Illustrated.

EDGE Analysis

He's due back next week, but this is somewhat concerning. Muzzin is a stalwart on the second pair and only played 47 games last season due to injury. The 33-year-old is an important pillar for the team and fantasy managers who want pucks to stay out of the Leafs' net.