Denis Mulcahy (born 15 August 1956) is an Irish retired hurler who played as a right corner-back for the Cork senior team.
As a member of the Munster inter-provincial team on a number of occasions, Mulcahy won one Railway Cup medal as a non-playing substitute.
After some success at underage levels, culminating in the winning of an East Cork minor championship in 1972, Mulcahy subsequently joined the Midleton intermediate team.
In 1978 he enjoyed his first major success when he captured a championship medal in the intermediate grade as Midleton defeated Newtownshandrum by 1-12 to 1-10.
The following year Midleton were back in the decider and Mulcahy collected a second championship medal as the club secured a 1-18 to 1-10 defeat of Blackrock.
Mulcahy made his senior championship debut on 3 June 1984 in a 3-15 to 2-13 Munster semi-final defeat of Limerick.
[2] The subsequent All-Ireland final on 2 September 1984, played at Semple Stadium in Thurles, saw Cork take on Offaly for the first time ever in championship history.
A week later Mulcahy was at centre-back on the Cork junior football team that faced Warwickshire in the All-Ireland decider.
In 1985 Mulcahy added a second Munster medal to his collection as Cork defeated Tipperary by 4–17 to 4–11 in the provincial decider once again.
Four Cork goals, one from John Fenton, two from Tomás Mulcahy and one from Kevin Hennessy, stymied the Galway attack and helped the Rebels to a 4–13 to 2–15 victory.
Waterford beat Cork in the provincial semi-final in 1989 and Mulcahy effectively brought the curtain down on his inter-county career.
Mulcahy's impressive display at full-back during Midleton's club championship success in 1991 saw him being recalled to the Cork team in 1992.
John Power and Michael Phelan added two second-half goals to the one D. J. Carey scored in the first half to give Kilkenny a 3–10 to 1–12 victory.