Corcoran won his fourth Munster medal in 2005 following a 1-21 to 1-16 defeat of old rivals Tipperary. On 11 September 2005 Cork faced surprise semi-final winners Galway in the All-Ireland decider. A sixteenth minute Ben O'Connor goal gave Cork the platform needed to withstand a Galway fightback through a Damien Hayes goal, which brought Galway within a point with twenty-one minutes remaining. Galway failed to score for the last ten minutes as Cork claimed a 1-21 to 1-16 score line. It was Corcoran's third All-Ireland medal.