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Troy Brouwer suffered an apparent right shoulder injury 6:53 into the third period of the Chicago Blackhawks' 2-1 loss to Montreal on Tuesday.
The Blackhawks' right wing landed awkwardly against the boards in the left corner of the Canadiens zone after Lars Eller avoided Brouwer's attempt for an open-ice hit.
Brouwer skated off the ice to the dressing room on his own with his right shoulder hanging down. He did not return.
Chicago already has lost forwards Patrick Sharp (knee) and Dave Bolland (concussion) to injury.
Information from The Associated Press contributed to this report.