Toronto Maple Leafs forward Trevor Moore sustained a shoulder injury during the first period of their game against the Boston Bruins, the team announced on Friday.

Moore was involved in a collision with Boston's forward Chris Wagner and left the game shortly afterward. Moore has three goals and two assists in 21 games this season.

Leafs coach Mike Babcock said Moore will not accompany the team when they visit the Pittsburgh Penguins on Saturday night. Babcock also said he doesn't know how long Moore will be out. 

The team is already without the services of star forward Mitch Marner (ankle) and announced earlier in the day that Alexander Kerfoot is out indefinitely after having surgery to repair dental fractures.