Moynihan was an impressive underage player, idolising the style of Kerry All-Star forward John Egan and playing for his local GAA club Glenflesk, secondary school team St. Brendan's, Killarney and Kerry Minors and U21s. Moynihan's first taste of inter-county success arrived at the age of 16 when he was part of the Kerry Minor team that claimed the Munster crown in 1990. Growing in stature and influence, the young Moynihan had a stellar year in 1992 when he lined out for the St. Brendan's team that beat St. Jarlath's College of Tuam to win the Hogan Cup in the All-Ireland Colleges Final and also turned heads on the Kerry U21 team that won out in Munster. It was about this time that Mickey 'Ned' O'Sullivan, former Kerry captain and current manager of the Limerick senior football team, began to talk to people about Moynihan's potential. Séamus Moynihan, aged just 18, made his senior debut at midfield for Kerry in the Munster Final, replacing Gneeveguilla veteran Ambrose O'Donovan. Any elation felt by the young player at togging off alongside the likes of Kerry great Eoin 'Bomber' Liston and midfield colossus Jack O'Shea was muted as Kerry succumbed to a steely Clare side on a score of 2-10 to 0-12. It was O'Sullivan's last game in charge of the Kerry senior side.
Formative Career: 1992-1996
During the 1992 and 1993 campaigns, Moynihan was tried at half back, midfield and half forward before settling into the half back line. The next 3 championship seasons were unsettling from a Kerry viewpoint as 3 straight defeats by Cork in the 1993, 1994 and 1995 Munster Finals saw the Kerry seniors eyeballing a 10-year low. Despite this disappointing level of achievement at inter-county level, Séamus Moynihan was beginning a strong run of success at Sigerson Cup level, playing for U.C.C. in the 1994 and 1995 finals; then returning 2 years later in 1997 and 1998 whilst studying for a master's degree at IT Tralee to collect more winner's medals.
Retirement and plaudits
Moynihan announced his retirement from inter-county football on Saturday, 23 September 2006 through an article in The Irish Times. On the following Monday, Kerry team manager Jack O’Connor hailed Moynihan as "a one-off player" and said Kerry football would never see his like again. He also stated that Séamus was an inspiration to the entire Kerry team, particularly the younger players and that he would be missed. Announcing his decision to quit lining out for Kerry, Moynihan said: "All good things come to an end." On 18 December 2011, Séamus announced his retirement from club football after over 20 years of service for the Glenflesk senior football team.
Honours
Moynihan has won four All-Ireland medals, three National Leagues, nine Munster championship medals, four Sigerson Cup medals, three GAA All-Stars, one Railway Cup medal and one Division 2 title. He also won three county championship medals with East Kerry and captained his country in the International Rules series.
