Petrevski-Seton grew up playing for Halls Creek teams in the junior divisions of the East Kimberley Football Association. After moving to Perth for school, he began training with the Claremont Football Club, whose recruiting zone takes in the Kimberley region. Petrevski-Seton spent four seasons of WAFL colts (under-18) competition, making his debut at the age of 15. He made his senior debut for Claremont at the age of 17, playing three games early in the 2015 season. Petrevski-Seton also represented Western Australia at under-16 and under-18 level. He was named in the All-Australian team at the 2015 AFL Under 18 Championships.
