In 1951 Finn was just nineteen-years-old when he was appointed captain of the Tipperary senior team. The team's dominance of the provincial championship continued, with Finn lining out against Cork in the Munster decider. Cork's Christy Ring gave one of his best displays, however, the Tipperary full-back line of John Doyle, Tony Brennan and Mickey "the Rattler" Byrne also gave a defiant performance. A 2–11 to 2–9 victory gave Finn a second Munster medal. The subsequent All-Ireland decider against Wexford on 2 September 1951 provided Tipperary with the chance to secure a hat-trick of championship titles for the first time in over half a century. Nicky Rackard, Wexford's goal-scoring machine, was nullified by Tipp goalkeeper Tony Reddin, while Séamus Bannon, Tim Ryan and Paddy Kenny scored key goals which powered Tipp to a 7–7 to 3–9 victory. It was Finn's second All-Ireland medal, while he also had the honour of lifting the Liam MacCarthy Cup as captain.