A product of Port Adelaide's Next Generation Academy, Benny Barrett signed as a category B rookie for the 2025 season. The 172cm small forward came through Happy Valley and South Adelaide, and was named among South Australia's best in both of his 2024 state appearances. The club advised he would not be offered a contract for 2027. Port Adelaide delisted him at the end of the 2026 season. He is yet to play a senior AFL game.