Pavel Buchnevich did not play for the Blues against the New York Rangers on Tuesday because of NHL concussion protocol.
The forward, who was third on St. Louis with 46 points, tied for second in goals with 19, and fourth in assists with 27, was injured Tuesday in the third period of a 4-1 win against the Ottawa Senators after taking a hit from forward Austin Watson.
"He feels a little bit better today," Blues coach Craig Berube said of Buchnevich. "That's basically all I can tell with you that right now. ... We lose a real good player, I think, in all aspects of the game. He's in penalty kill, power play, 5-on-5 play, he's been a very good player, a 200-foot player."
Buchnevich did not practice Wednesday and did not take part in the morning skate Thursday. Forward Logan Brown played after being a healthy scratch the past seven games.
"It's tough. We don't want to lose a player like that for sure, but 'Brownie' will come in and do the job," Berube said.
Defenseman Marco Scandella returned after missing 11 games with a lower-body injury. Forward Oskar Sundqvist missed a second straight game with a lower-body injury.-- Lou Korac