Irish · Wexford, Ireland · Born 16 October 1969Irish thoroughbred trainer who has recorded over 400 Group 1 victories including a record six consecutive Epsom Derby wins from 2015 to 2020, making Ballydoyle the most prolific Classic stable in history.
Aidan O'Brien has trained more Group and Grade 1 winners in a single calendar year than any trainer in the sport's history, a volume of top-level success built on Coolmore's vast breeding and ownership operation feeding him an unusually deep pool of talented horses every season. His son Joseph O'Brien rode as a top jockey before becoming a trainer himself, giving the O'Brien name a second generation of success in Irish racing -- a family dynasty that's become one of the sport's more visible modern examples of racing knowledge passing directly from father to son within the same operation. O'Brien's Ballydoyle stable produces classic winners at a rate that's arguably reshaped what's considered normal output for a single training operation, a scale of success that makes individual training-yard comparisons with almost anyone else in the sport feel slightly beside the point.
Training multiple Classic winners and being Champion Trainer
How They Played
Methodical approach with large string of quality horses and strong partnership with Coolmore
Lasting Impact
One of the greatest Flat racing trainers in history with record-breaking achievements
Career Honours
- Champion Trainer Ireland (multiple times)
- Champion Trainer Great Britain (multiple times)
- Leading trainer at Royal Ascot (multiple times)
- Irish National Hunt Champion Trainer (1994-1996)
Irish Athletes