 After being introduced as a substitute for Cork teammate Kevin Hennessy, Mulcahy went on to claim his first Railway Cup medal following a 2–9 to 1–18 defeat of arch rivals Leinster.In 1985 Mulcahy was included on the starting fifteen as part of an all Cork full-forward line.A narrow 3–6 to 1–11 defeat of Connacht gave Mulcahy a second Railway Cup medal.