The Colorado Avalanche are concerned about the seriousness of an injury to All-Star center Nathan MacKinnon.
The team announced Tuesday that MacKinnon won't play against the Calgary Flames because of an upper-body injury.
Head coach Jared Bednar told reporters MacKinnon is going back to Denver for further evaluation and there is a "high" level of concern about the injury.
Bednar added it is "possible" MacKinnon suffered the injury from a fight during Sunday's 3-2 loss against the Minnesota Wild.
This article will be updated to provide more information on this story as it becomes available.