His league and championship career at senior level playing for the Dublin county team spanned thirteen seasons from 1979 to 1992.
[1][2] Born in Dublin, Duff first played competitive Gaelic football during his schooling.
He later joined the Fingallians club and won a county junior championship medal in 1993.
Duff made his debut on the inter-county scene at the age of seventeen when he was picked on the Dublin minor team.
Duff also played association football for Swords Celtic and Shelbourne, making his League of Ireland debut as a substitute on 8 December 1985.