Sheehan played his club hurling with his local Éire Óg side and enjoyed much success. In 1960 he was barely out of the minor ranks when he captured a Mid-Cork junior championship title following an eight-point drubbing of Ballincollig. It was the first of three divisional titles in-a-row for Sheehan and Éire Óg as Cloughduv and Ballincollig were subsequently defeated in the finals of 1961 and 1962. The latter win saw Éire Óg reach the final of the county junior championship. East Cork champions Carrigtwohill were the opponents, however, Éire Óg triumphed on a score line of 3-4 to 2-4. This victory allowed Éire Óg to move into the county intermediate championship. In their very first year in the new grade Sheehan's side captured the county intermediate league title. Two years later in 1965 Éire Óg reached the final of the intermediate championship. Cork kingpins Glen Rovers were the opponents and an exciting hour of hurling developed. At the long whistle Sheehan ended up on the losing side as 'the Glen' recorded a 3-8 to 3-5 victory.
Inter-county
Sheehan first played for Cork as a member of the minor hurling team on 18 May 1958. He scored 1-1 on his debut in a 2-15 to 3-7 Munster quarter-final defeat by Clare. Sheehan's two seasons as a member of the minor team ended without success. In 1963 Sheehan was back playing inter-county with Cork, this time as a member of the intermediate team. He won a Munster medal the following year after scoring 1-1 in Cork's 4-14 to 1-10 defeat of Galway. On 16 August 1964 Cork faced Wexford in the All-Ireland decider. A low-scoring 2-8 to 1-5 defeat was Sheehan's lot on that occasions. Sheehan made his senior championship debut for Cork on 4 July 1965 in a 2-6 apiece Munster semi-final draw with Waterford. The following year Sheehan was a regular member of the starting fifteen. A 4-9 to 2-9 defeat of Waterford in the provincial decider gave him a Munster medal. The subsequent All-Ireland final on 4 September 1966 pitted Kilkenny against Cork for the first time in nineteen years. Kilkenny were the favourites, however, a hat-trick of goals from Sheehan gave Cork a merited 3-9 to 1-10 victory over an Eddie Keher-inspired Kilkenny. Not only was it a first championship for Cork in twelve years, but it also gave Sheehan an All-Ireland medal. Sheehan played no part in Cork's unsuccessful championship campaign in 1967 but was restored to full-forward the following year as Cork faced a 2-13 to 1-7 Munster final trouncing by Tipperary. This defeat brought the curtain down on Sheehan's inter-county career. He has now settled down with his wife Kitty Sheehan and their seven kids all have kids of their own giving him twenty six amazing grandchildren many of whom play GAA for Éire Óg and some who even play for underage Cork teams.
