[1] Recruited from Ivanhoe Grammar School,[citation needed] O'Halloran debuted for Hawthorn in 1976 as a defender and was a premiership player that year.
Nicknamed "Rubber",[1] O'Halloran won another premiership with Hawthorn in 1983 and after being on the losing grand final team two years later he left Hawthorn, finishing with 160 games.
A Victorian representative in interstate football, O'Halloran was selected in the 1982 'Team of the Year' by the VFL.
Married with two children, O'Halloran died from a heart attack while cycling on 11 April 2013 at age 57.
This Australian rules football biography of a person born in the 1950s is a stub.