In the 2019-20 season, he appeared in 16 games for them, posting a 3.84 goals-against average. As the 2020-21 season was canceled, Gaudreault did not play this season. He served, however, as Genève-Servette HC's third goalie during the playoffs.
HC Sierre adds goaltender Lucas Gaudreault to their roster
The 21-year-old goaltender has agreed to a one-year contract with the Swiss League team.