Ethan Crelinsten is a Canadian professional submission grappler and former student of John Danaher and Firas Zahabi in jiu-jitsu, who represented the New York-based Renzo Gracie Academy and Montreal's TriStar Gym in the sport's international tour before he formed his own squad, B-Team. Ethan gained notoriety in jiu-jitsu's no-gi circuit after his wins at the North American ADCC Trials (2018, 2019), and his victories over established pro-athletes while Crelinsten himself was still a colored belt.