Marchessault is expected to miss Tuesday's game vs. the Hurricanes after being placed in COVID-19 protocol, one day after William Carrier was. With Marchessault out, the Golden Knights will be without Marchessault, William Karlsson, Max Pacioretty, Jack Eichel and Nolan Patrick up front.
McCarron has picked up two assists in seven games with Milwaukee this season. He comes up to replace Filip Forsberg, who is week-to-week with an upper-body injury and was moved to IR.
Forsberg is week-to-week with an upper-body injury, so he was moved to IR to open up a roster spot to recall Michael McCarron from Milwaukee (AHL).
Being placed on the COVID-19 reserve list makes O'Reilly questionable for Thursday's game vs. the Avalanche. To replace O'Reilly on the roster, the Blues recalled Dakota Joshua from the AHL.