Pavel Buchnevich sustained an upper-body injury in Saturday's game against the Seattle Kraken and did not return.
Buchnevich recorded 5 minutes, 27 seconds of ice time in the game, recording one hit before leaving the game late in the first period.
After the game, Blues Head Coach Craig Berube said he did not know the severity of the injury but did rule out a concussion.
Buchnevich will be re-evaluated on Sunday.
