 He won a Munster Under-21 Championship medal in that code on 8 September 1966 when he lined out at right wing-back in a 5-12 to 2-06 defeat of Limerick in the Munster final.Coughlan retained his position on the starting fifteen for the 3-12 to 5-06 All-Ireland final draw with Wexford on 2 October 1966.He was again selected at right wing-back for the replay on 23 October 1966, however, the game once again ended in a 4-09 apiece draw.