Donnacha O’Brien
Donnacha O’Brien is a prominent Irish horse racing trainer and former jockey known for his successful career in the sport. He is the son of legendary trainer Aidan O’Brien and gained recognition as a talented jockey before transitioning to training. He notably won the Irish Derby as a trainer with Latrobe in 2018, showcasing his skills in both roles.
Not in the pool (under ¢1).
Recent news mentions
Donnacha O’Brien was involved in saddling the winners of the two other Group One prizes.
Scandinavia highlights Aidan O’Brien Group One double with Irish Leger victory – The Irish Times
Ireland· 2026-09-13
Donnacha O’Brien labelled Foley’s riding as 'brutal' on Sunday following the previous day’s €1.25 million Leopardstown feature.
Shane Foley’s Champion Stakes ride slammed as ‘brutal riding’ by Donnacha O’Brien – The Irish TimesIreland· 2026-09-13
Donnacha O'Brien saddled a first Breeders’ Cup winner with Balantina in the Juvenile Fillies event.
Willie Mullins supplies Breeders’ Cup shock as Ethical Diamond secures a first win and $5m prize – The Irish TimesIreland· 2025-11-02
Joseph O’Brien combined with his brother Donnacha to land the race as a trainer through Latrobe in 2018.
Ryan Moore has historic Irish Derby hat-trick in his sights aboard Epsom hero Lambourn – The Irish TimesIreland· 2025-06-23
