[1] At club level he played with Midleton and was also a member of the Cork senior football team.
O'Neill first appeared on the inter-county scene as a member of the Cork minor football team in 1981.
He won an All-Ireland Minor Championship title in his debut season after scoring three goals in the final against Derry.
A subsequent three-year spell with the under-21 team yielded two consecutive All-Ireland Under-21 Championship titles.
He currently lives in Colorado, and his son Shane is a professional footballer and a former United States youth international.