After a low point the previous year, Kerry were back in the provincial decider again in 2000. Ó Sé lined out in his sixth Munster final, his second with Clare as opposition. In a disappointing match as regards a contest, Kerry walloped 'the Banner men' by 3–15 to 0–8. It was Ó Sé's fourth Munster medal. Kerry had firmly established their All-Ireland contender credentials, however, the All-Ireland series proved difficult. Ó Sé's side drew with Armagh in the semi-final, while the replay proved just as tense. Both sides finished level after seventy minutes once again and it took a period of extra-time to find a winner. Kerry narrowly emerged from that game as the 2–15 to 1–15 winners and booked a place in the Millennium All-Ireland final. Galway provided the opposition in what was their second championship decider appearance in three years. In a game to forget both sides missed easy chances and seemed apprehensive about taking a lead. Galway trailed by seven points at one stage, but clawed their way back to secure a 0–14 apiece draw. The replay was a much more conclusive affair. Galway worked the ball the length of the field to Declan Meehan who scored a goal to give the westerners a boost. A disputed free with seventeen minutes left in the game gave Kerry a lead which they would not relinquish. At the full-time whistle Kerry were the champions by 0–17 to 1–10. It was Ó Cinnéide's second All-Ireland winners' medal, while his performances also earned him an All-Star.
