He was recruited by Fremantle with their first selection, 7th overall, in the 2021 rookie draft.[3] He played for Fremantle's reserves team, Peel Thunder, in the West Australian Football League (WAFL) during the pre-season, and was suspended for two games for striking former Fremantle player Brady Grey during one of the games. Due to a misalignment of the WAFL and AFL season, the two week suspension was initially thought to be effectively four weeks, until the AFL made a ruling that the suspension to play for Fremantle for shall be considered as two weeks of the AFL season, not the WAFL season.[4] Treacy made his AFL debut during the fourth round of the 2021 AFL season in Fremantle's clash against Hawthorn.[5] Treacy kicked a game high three goals in round 12 during Fremantle's match against the Western Bulldogs at Optus Stadium. Treacy finished his debut season having played 15 games and kicked 13 goals.
Treacy had a frustrating start to the 2022 AFL season, suffering a groin injury during pre-season. Injuries to both his ankles as well as contracting glandular fever saw his season restricted to four games.[6]
Treacy made his return during round 1 of the 2023 AFL season during Fremantle's clash against St Kilda, after a strong pre-season.[7] Treacy kicked 2 goals in round 9 during Fremantle's 17 point win over Sydney at the Sydney Cricket Ground.[8] Treacy kicked 3 goals in
round 18 during Fremantle's game against Collingwood at the MCG.[9] Treacy signed a three-year contract extension during the 2023 season tying him to Fremantle until at least 2026.[10] He finished the season having played a career high 17 games.
Treacy made the line-up for Fremantle's opening game of the 2024 AFL season against the Brisbane Lions at Optus. He finished the game with twelve disposals and three goals in the 23 point come from behind win.[11] He kicked three goals within a 5 minute period four weeks later against Port Adelaide at Adelaide Oval, and finished the game with sixteen disposals.[12] His fine form continued throughout the next three weeks kicking nine goals to sit atop Fremantle's leading goalkicker tally. Treacy kicked a career-best five goals in round seventeen against Richmond at Optus Stadium.[13] He signed a four-year contract extension on July 31st, 2024, to keep him at Fremantle until at least 2030.[14] Treacy kicked three goals and collected nine disposals in round twenty-one against Essendon at the MCG.[15] Unfortunately, he suffered a knee injury during the match[16] and as a result missed Fremantle's last three games of the season.[17] He finished the year as Fremantle's leading goalkicker having kicked 45 goals across 20 games in a breakout season, as well as an eighth place finish in the Coleman Medal.[18]
Statistics
Statistics are correct to the end of round 24, 2024[19]