In 2006 Kerry reached the final of the National League and played Galway. Ó Sé's side could only manage three points in the opening half; however, the introduction of Eoin Brosnan transformed the team. At the end of the seventy minutes a 2–12 to 0–10 score line gave Kerry their 18th National League title. The league win was a false dawn as Kerry went out tamely to Cork in a replay of the Munster final. The team, however, bounced back against Longford to set up a meeting with Armagh in the All-Ireland quarter-final. At half-time it looked as though the Ulser hoodoo would strike again but Kerry blitzed the men from the orchard county in the second half with Ó Sé dominating midfield while Kieran Donaghy shone at full-forward. They won by a score of 3–15 to 1–13, in the process putting paid to the notion that Kerry had no answer to the northern style of defensive play. Kerry again beat Cork in the subsequent semi-final before lining out against Mayo in the All-Ireland final. An unbelievable opening first-half saw Kerry go 2–4 to no score ahead after just ten minutes, courtesy of goals by Declan O'Sullivan and Kieran Donaghy goals. Colm Cooper slotted a third Kerry goal; however, Mayo settled and reduced the deficit to 3–8 to 3–2 at half-time. The second thirty-five minutes saw Kerry run riot while the westerners could only muster three points. A final score of 4–15 to 3–5 gave Kerry another All-Ireland title and gave Ó Sé another All-Ireland winners' medal. Ó Sé finished off the year with a second All-Star award.