 Dubé was drafted in the first round of the 2013 Western Hockey League bantam draft by the Kelowna Rockets.Dubé averaged 1.38 points per game in 40 games with the Kelowna Rockets during the 2016–17 season, and was named an alternative captain of the Rockets before the 2017–18 season.That season, he recorded career-highs in goals, assists, and points and was awarded the Rockets President's Award as a player who made outstanding and significant accomplishments.