He previously played for Claremont in the West Australian Football League (WAFL).
[2] After spending the entire 2022 season playing for Casey in the Victorian Football League, he made his debut in the 50-point win against Sydney at the Melbourne Cricket Ground in the third round of the 2023 season, kicking three goals and making six tackles.
[3] During the Round 8 game against Gold Coast, van Rooyen was charged with striking and suspended for two weeks when an attempted spoil on Charlie Ballard resulted in his arm hitting his opponent's head.
Van Rooyen's 2023 season is known for its accuracy, having the highest goal-to-behind percentage of any player in the league to have 30 or more scoring shots, scoring 28 goals and 9 behinds and resulting in an accuracy percentage of 75.7%.
[7] After Melbourne’s Qualifying Final in 2023 van Rooyen received a one match ban due to a high bump on Collingwood player Daniel McStay.