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|Irish name||Séamus Ó Braonáin|
Castlecomer, County Kilkenny, Ireland
Brennan made his first appearance for the team during the 1990-91 National League and was a regular member of the starting fifteen until his retirement after the 1995 championship. An All-Ireland-winning captain in the under-21 grade, Brennan later won two All-Ireland medals and three Leinster medals at senior level.
At club level Brennan played with Erin's Own.
- "Kilkenny GAA profile". Hogan Stand website. Retrieved 13 July 2012.
| All-Ireland Under-21 Hurling Final