Semin was injured Saturday during the Hurricanes' 4-2 loss to the St. Louis Blues on a hit by Blues defenseman Alex Pietrangelo. Semin returned to the ice briefly after the hit, but left the game for good in the second period.
The 29-year-old was out of the lineup Monday against the Boston Bruins.
Semin, who was second on the Hurricanes with 44 points last season, has three goals and six assists in 20 games this season.
We think that Randy is a very good coach. Our players think that Randy is a very good coach. We think that he's going to get the most out of this group. With the addition of the two assistants, a bit of a different dynamic, we're very comfortable that this is a quality coaching staff that's going to maximize the potential of this team.
— Maple Leafs GM Dave Nonis on head coach Randy Carlyle and his staff