His athletic journey began in football (soccer), where he played at a competitive level for teams such as Rampla Juniors and Club Sportivo Cerrito.

Despite showing promise in football, Zaruski's career took a different turn when he discovered mixed martial arts (MMA).

[1] Inspired by the UFC and the performances of fighters like Frank Mir, Zaruski decided to pursue a career in MMA.

He initially trained at Scorpion, a mixed martial arts gym in Montevideo, Uruguay, where he developed a passion for grappling.

[6][7][8][9][10][1] As a Black Belt he captured double gold at the ADCC in Mexico City[11][12]and the Super Heavyweight No-Gi Black Belt World Title (First and only Uruguayan in the history of the sport), where he submitted 4 of his 5 fights in his run for gold including a triangle choke submission in the finals against Vinicius Trator.