Tallis Duncan

Duncan was born in Wollongong, New South Wales. He played his junior rugby league for Paddington Colts and Clovelly Crocodiles in the Eastern Suburbs District Junior Rugby League. Duncan went on to sign with the Sydney Roosters S.G. Ball side in the S.G. Ball Cup. He was named best forward for the 2019 season. After the 2020 season was called off due to COVID-19 Duncan went on to sign with the South Sydney Rabbitohs for the 2021 season.^{[citation needed]}

In 2021, Duncan joined the South Sydney Rabbitohs. He was named in the Rabbitohs side for the 2022 NRL Trials. He made his debut against the North Queensland Cowboys, with the Rabbitohs losing 24–12. Duncan was sent to the sin bin in the 62nd minute of the game, and was later charged with a grade 1 dangerous tackle. Duncan was named in the Malta international side and represented them on 22 June against the Lebanon national rugby league team. Duncan played the remainder of the 2022 season as a member of the South Sydney NSW Cup side. Duncan was named the Player of the Year and Player's Player for the 2022 Jersey Flegg Cup season. Duncan made his first grade debut from the bench in his side's 33–26 loss to the Canberra Raiders at Stadium Australia in round 13 of the 2023 NRL season. In round 19 of the 2023 NRL season, Duncan scored his first try in the top grade as South Sydney lost 36-32 against Canterbury. On 24 September 2023, Duncan played for South Sydney in their 2023 NSW Cup grand final victory over North Sydney.