While a number of his teammates retired, Coughlan, who was approaching 35, once again committed to Cork for the 1979-80 season. On 4 May 1980, he was at right wing-back when Cork drew 2-10 apiece with Limerick in the National League final. Coughlan retained his position on the starting fifteen for the replay two weeks later and claimed a third National Hurling League medal after the 4-15 to 4-06 victory. On 20 July 1980, Coughlan was again selected at right wing-back when Cork and Limerick renewed their rivalry in the Munster final. In what was his last game for Cork, he ended on the losing side after the 2-14 to 2-10 defeat.