Finn first appeared for Mayo as a member of the minor team that won the Connacht MFC title in 1980. He was later drafted onto the under-21 team and, as well as winning consecutive Connacht U21FC titles, also claimed an All-Ireland U21FC medal in 1983.[4] Finn joined the senior team in 1984 and was a mainstay of the team for over a decade.[5] During that time, he won five Connacht SFC medals and was at left wing-back when Mayo were beaten by Cork in the 1989 All-Ireland final.[6]