Traded in from Gold Coast during the 2025 exchange period, Rosas Jnr gave the Sydney Swans' forward line instant dash, kicking 5 goals in a half against Melbourne in 2026 and drawing a Goal of the Year nomination for a boundary-line finish. Originally pick 37 in the 2019 rookie draft, the 180cm forward played 49 games for the Suns. He has played 65 AFL games and kicked 62 goals.