Defenseman Erik Johnson is the latest casualty in an avalanche of injuries that have buried Colorado during the shortened NHL season.
Johnson is out indefinitely with a head injury that occurred during Monday night's overtime loss to Phoenix. He took a hard check from the Coyotes' Martin Hanzal and left the game.
Add Johnson's name to a list that includes captain Gabriel Landeskog (head), defenseman Ryan Wilson (ankle) and forward Steve Downie (knee). Forward Ryan O'Reilly hasn't played this season because of a contract dispute.
Forward John Mitchell (flu) and defenseman Matt Hunwick (torso) are expected to return Thursday for a game at Minnesota.
In 11 games this season, Johnson has one assist while averaging more than 20 minutes for the Avalanche (4-6-1), who have lost three straight games.