In 1984, the centenary year of the Gaelic Athletic Association, Mac Curtain won a sixth Munster Championship medal following a thrilling game against Tipperary. He later added a third All-Ireland medal to his collection following a defeat of Offaly in a special All-Ireland final in Semple Stadium. In 1985 another Munster title came Mac Curtain's way, however, Galway were victorious over Cork in the All-Ireland semi-final. In 1986 a fifth consecutive provincial medal brought Mac Curtain's overall tally up to eight. He missed the All-Ireland final win over Galway to injury. He returned in 1987 but Tipperary defeated Cork in the Munster final. Mac Curtain later retired from inter-county hurling.