Born in Australia, DJ grew up in the United States playing his college basketball for the Wake Forest Demon Deacons and Santa Clara Broncos.
After college, DJ headed to the Netherlands joining BAL of the BNXT League averaging 16pts, 8.2 rebounds and 2.8 assists per game in his first pro season.
In June 2022, Mitchell moved to Australia and joined the Gold Coast Rollers of the NBL1 North. Helping the Rollers win the 2022 NBL1 North championship.
In 2022-23 the 6’8” forward joined the Brisbane Bullets before signing for Polish team Śląsk Wrocław reaching the championship series.