Coughlan had a lengthy career with Offaly, first coming to notice as a sub on the first Offaly team to win the Leinster Senior Football Championship in 1960. He was only 19 at the time. He progressed to win All-Ireland Senior Football Championship medals in 1971 and 1972 when Offaly beat Galway and Kerry. He didn't play in the 1971 final but did win a medal as a substitute and was a key figure at left corner back in the following year's success.[3]