Mitchell was part of the Sydney Roosters under 20s system where he won an SG Ball title in 2014 with his younger brother Latrell. Mitchell has played for the Wyong Roos in the NSW Cup, with a playing weight of 175 kg in 2018.[1] As of 2022 Mitchell has dropped over 25 kg and training with the South Sydney Rabbitohs with a goal to play in the NRL, following his Indigenous All Stars debut.[2]
In round 8 2022, Mitchell made his NRL debut for South Sydney against the Manly-Warringah Sea Eagles at Central Coast Stadium. Mitchell played eleven games for South Sydney in the 2023 NRL season as they finished 9th on the table and missed the finals. On 24 September 2023, Mitchell played for South Sydney in their 2023 NSW Cup grand final victory over North Sydney.[4]