Demidov (lower body) was placed on injured reserve by the Canadiens on Tuesday, per the NHL media site.
Demidov's placement on injured reserve is simply procedural after the Canadiens announced Tuesday that he'll be sidelined for 2-4 weeks due to a lower-body injury. The 20-year-old appeared in all 82 regular-season games for Montreal last year and recorded 19 goals, 43 assists, 34 PIM, 28 hits and 26 blocked shots while averaging 15:30 of ice time.