Delahunty, who grew up in Murtoa, went to Monivae College and was originally zoned to Essendon, but made his way to Collingwood.
[1] He made 12 appearances for Collingwood in 1971, his first season, including a game against Essendon in which his brother Hugh Delahunty debuted, that was drawn, as well as a semi-final.
[2][3] A defender, Delahunty's 1972 season ended in round nine, when he broke his leg while playing Geelong at Victoria Park.
[5][6] Collingwood were minor premiers that year, but were win-less in the finals series, which Delahunty didn't take part in.
[10] His brother Hugh played 46 games for Essendon and is now the Member for Lowan in the Victorian Legislative Assembly.