The injury occurred on Kassian's second shift of the game when he finished a check on Canadiens captain Shea Weber. After throwing the hit, Kassian was clearly in some discomfort and was unable to put any weight on his left leg. He slowly made his way to the team's bench and disappeared into the locker room.
The 30-year-old Kassian missed 17 games earlier this season with an upper-body injury. He has two goals and five points in 26 games.