Brett O'Farrell (born 3 January 1978) is a former Australian rules footballer who played with Sydney and Hawthorn in the Australian Football League (AFL).
At Under-18 level, O'Farrell played for Prahran and it was from there that he was recruited by Sydney with the 14th selection of the 1996 AFL draft, a pick which had been received as part of the Anthony Rocca trade.
He spent a season in the reserves before making his debut in 1998, filling in for ruckman Greg Stafford.
[1] He was traded to Hawthorn in the 1998 AFL draft, to serve as an understudy to ruckman and forward Paul Salmon.
[2] However O'Farrell suffered numerous injuries during his time at Hawthorn and was not able to put together more than nine appearances.