The Canadiens activated Brook (knee) off injured reserve and reassigned him to AHL Laval on Wednesday.
Brook (knee) is listed on injured reserve, per CapFriendly.
Brook (knee) was sent down to AHL Laval on Friday.
The Canadiens have loaned Brook to Krefeld Pinguine of Germany's DEL for the start of the 2020-21 campaign.
Brook (undisclosed) took the ice for practice Tuesday, Arpon Basu of The Athletic reports.
Brook missed the start of training camp Monday after being deemed "unable to practice" per John Lu of TSN.ca.
Brook was named to Montreal's Phase 3 training camp roster.
Brook was minus-3 in a 4-2 loss to the Ottawa's rookies Saturday.
Brook was reassigned from WHL Moose Jaw to AHL Laval on Friday.
Brook will skate for Team Canada at the IIHF Under-20 Championship that kicks off in British Columbia on Wednesday, Pat Hickey of the Montreal Gazette reports.