St. Louis Blues defenseman Carl Gunnarsson suffered a lower-body injury with 9:20 remaining in the second period on Monday night against the Los Angeles Kings.
Gunnarsson was injured in a battle for the puck along the boards behind the Blues' net.
He did not return to the game.
In his postgame press conference, Blues Head Coach Craig Berube said Gunnarsson will be "out awhile" but will be re-evaluated further on Tuesday.
"That's a guy that has laid it on the line for this organization for a long time," Brayden Schenn said after the game. "He's a hell of a teammate and a good guy. Hopefully it's not too serious. The guy is an absolute warrior. It's tough to see."
Gunnarsson has played in 11 games for the Blues this season, posting two assists.