 He made his senior debut in a Munster Championship game against cork in 1998, however, he played no part in Kerry's subsequent defeat of Tipperary in the Munster final.Ó Sé's side were later dumped out of the championship by a Mick O'Dwyer-managed Kildare in the All-Ireland semi-final.In 1999, Kerry were attempting to secure a fourth provincial title in succession, while Ó Sé was hopeful of winning his first on the field of play.