He is the youngest of the highly successful Barrett rugby brothers and has served as an All Blacks vice-captain alongside Ardie Savea in recent years. Barrett returned to the Hurricanes and was part of their 2026 Super Rugby Pacific championship-winning squad. He has committed to New Zealand Rugby, the Hurricanes, and Taranaki through to the end of 2028 (covering the 2027 Rugby World Cup cycle and potential involvement around the 2029 Lions tour). He reached the Rugby World Cup semi-finals or better in 2019 (third place) and 2023 (runners-up). With the Hurricanes he claimed the 2026 Super Rugby Pacific title, and with Leinster he won the 2024-25 United Rugby Championship.