Career
Recruited from Ivanhoe Grammar School, O'Halloran debuted for Hawthorn in 1976 as a defender and was a premiership player that year. 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.