Gilbert has played in just one of the Sabres' first 11 games.

Gilbert signed a one-year, $825,000 contract with the Sabres on Monday.

Gilbert was scratched for 20 of the Flames' final 23 games this season.

Gilbert hasn't played in the Flames' last 10 games.

Gilbert has played just three times in the Flames' last 13 games.

Gilbert (concussion) will be activated from injured reserve ahead of his expected return to action versus Edmonton on Saturday.

Gilbert (concussion) was put on injured reserve Wednesday, per Pat Steinberg of Sportsnet 960 The Fan.

Gilbert, who was previously listed as having an upper-body injury, has been in the concussion protocol. He's making progress and will travel with the Flames for their games in Arizona on Thursday and Vegas on Saturday, but the Calgary defenseman isn't expected to participate in either contest, per Pat Steinberg of Sportsnet 960 The Fan.

Gilbert (upper body) is not expected to play Tuesday against Ottawa, per Pat Steinberg of Sportsnet 960 The Fan.

Gilbert (upper body) won't play Sunday against Chicago, Pat Steinberg of Sportsnet 960 The Fan reports.