Cummins first came to prominence on the inter-county scene as a member of the Cork senior football team in 1968. The following year he became a dual player when he made his first appearance on the Cork senior hurling side. Cummins's first appearance was when he came on as a substitute in the Munster final trouncing of Tipperary. This win allowed Cork to advance directly to the All-Ireland final where Kilkenny provided the opposition. It was Cummins's first full game with the senior hurling team. It was a baptism of fire for the young hurlers as he was marking Pa Dillon, one of Kilkenny's most intimidating players. Cork took an early lead, however, after Pat Delaney was stretchered off Kilkenny came from behind to win the game by 2–15 to 2–9.