[1] O'Sullivan, who was a good performer for Ascot Youth Centre in the Essendon District League before joining the VFL, played his football on the wing and as a half-forward flanker.
[2] After making 12 appearances in his debut season with Essendon, O'Sullivan played 19 games in 1953, including a semi final.
Over the next two seasons O'Sullivan found in more difficult to establish a place for himself in the side.
[4] In 1962 O'Sullivan coached Sorrento in the Mornington Peninsula Football League.
At the age of 40, O'Sullivan, a passenger, was killed in a car accident on the Calder Highway, south of Ouyen, on 23 September 1972.