He won the 1990 Stawell Gift and represented Australia in the 200 metres at the 1992 Barcelona and 1996 Atlanta Olympic Games.
In 1993, he reached his peak in the World Athletics Championships in Stuttgart, Germany, when he set a new personal best of 20.18 seconds over 200 metres.
IAAF general secretary Istvan Gyulai said that the reinstatement of Capobianco in July 1996 following a report for Athletics Australia by Robert Ellicott, QC, was a mistake.
[3] Capobianco raced in Dijon the day prior to Hengelo and returned a negative (clear) drugs test.
Capobianco's costs for arbitration were paid by the IAAF and his ban was later reduced to 2 years.