On 21 January 2017, the team released Jermaine Beal from the roster and signed Fullarton to a full contract for the 2017-2018 season.

[3] In May 2018, Fullarton announced he would leave the Bullets and basketball to play for Australian rules football for the Brisbane Lions in the AFL.

[4] Fullarton spent the 2018 and 2019 seasons playing in the North East Australian Football League.

[5] He made his debut appearance in Round 13 of the 2020 AFL Season against St. Kilda coming off the bench, kicking one goal and two behinds.

Fullarton was traded to the Melbourne Football Club on 13 October 2023 for a third round national draft pick.