Blues Head Coach Craig Berube said both players would need further evaluation from team doctors before knowing whether the injuries would be more short-term or long-term.
Thomas Greiss will start in goal Tuesday. He spent five seasons with the New York Islanders from 2015-20, earning 101 wins in 193 regular-season appearances. He also captured the William Jennings Trophy along with Robin Lehner in the 2018-19 season for the goalie tandem with the fewest goals against.