was at full-forward as WIT faced University College Cork in the final of the Fitzgibbon Cup. Two goals from Declan Browne in a six-minute spell before half-time gave WIT a commanding lead. Neil Ronan bagged a fourth goal straight after the interval which helped WIT to a 4–15 to 3–12 victory. Shefflin lined out in a second successive Fitzgibbon Cup decider in 2000. University College Dublin were the opponents on that occasion, however, a 2–10 to 1–6 victory gave WIT the victory. It was Shefflin's second Fitzgibbon Cup medal. Club Shefflin played his club hurling with Ballyhale Shamrocks and has had much success with the club. When he was fourteen years-old he failed to make the club's under-16 team, however, Shefflin later became a key member of the Ballyhale minor team. He won a championship medal in that grade in 1997 following a 2–18 to 2–5 defeat of James Stephens. That same year Shefflin was a key member of the Ballyhale intermediate team. A 4–12 to 3–7 defeat of Graiguenamangh, with Shefflin top scoring with 1–6, secured promotion to the senior grade and gave Shefflin a championship medal. Success at senior level was slow in coming for Shefflin and Ballyhale. In 2004 it was even rumoured that he was moving clubs to play in Cork with Blackrock, however, this rumour proved to be unfounded. Two years later he was deployed at centre-forward as Ballyhale faced O'Loughlin Gaels in the senior decider. An impressive 1–22 to 2–11 victory gave Shefflin his first championship medal. He later added a Leinster medal to his collection when Ballyhale secured a comprehensive 1–20 to 1–8 defeat of Birr to take the provincial title for the first time in seventeen years. On 17 March 2007 Ballyhale Shamrocks faced Loughrea in the All-Ireland decider. On a day when Shefflin and James "Cha" Fitzpatrick were held scoreless, the three Reid brothers contributed 3–7 from play. A 3–12 to 2–8 victory gave Shefflin an All-Ireland Senior Club Hurling Championship medal. Injury resulted in Shefflin missing Ballyhale's second successive championship victory in 2007, however, he was back on the starting fifteen as Ballyhale Shamrocks made it three-in-a-row in 2008. A 2–11 to 0–12 defeat of James Stephens gave Shefflin a second championship medal on the field of play. He later won a second Leinster medal as the Shamrocks defeated reigning champions Birr by 2–13 to 1–11. Shefflin won a third