With the Canadiens' season concluded, Mailloux will return to the Laval Rocket (AHL) after making his NHL debut on Tuesday against the Detroit Red Wings. The 21-year-old has played 70 games with the Laval Rocket in his first professional season, scoring 47 points (14G / 33A).

Mailloux was the 31st overall pick of the Canadiens in the 2021 NHL Entry Draft. The 21-year-old has played 70 games with the Laval Rocket in his first professional season, scoring 47 points (14G / 33A).