He made his debut in round 19 of the 2018 AFL season against the Western Bulldogs at Eureka Stadium, kicking one goal.
Farrell then played for Castlemaine Football Club and the Bendigo Pioneers' under-15s, 16s and 18s teams.
[3] He represented Vic Country in the 2017 AFL Under 18 Championships, averaging 14 possessions and three marks per game.
[8] Before his AFL debut, he played 13 matches in the South Australian National Football League, kicking 20 goals.
[9] Ahead of his debut, Port Adelaide development coach Aaron Greaves described him as a "lovely left foot" and a "classy finisher".