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Aidan O'Brien

Born: 16 October 1969

Nationality: Irish

First Winner as Trainer: Wandering Thoughts (1993)

British Classic Wins: 18

Irish Classic Wins: 28

Notable Horses Trained: Giant's Causeway, Galileo,  Rock of Gibraltar, High Chaparral, Imagine, Istabraq, George Washington, Dylan Thomas, Yeats, Henrythenavigator, Mozart, Fame and Glory, Starspangledbanner, So You Think,

Career History

Aidan O'Brien has quickly propelled himself into one of the great racehorse trainers of modern times and continues to break records from his Ballydoyle base.

A champion amateur jockey in 1993 he was also plying his trade as an assistant at Jim Bolger's yard and when he decided to gain his own training licence the Co. Wexford youngster never looked back.

He burst on to scene with two winners at Tralee in June 1993 and it was just the start of a legacy that has seen him train Classic winners on the flat as well as gaining notable successes over jumps.

Throughout the mid '90s O'Brien continued to breed success and when he moved to the Ballydoyle stables he just got bigger and bigger.  In 1995 he showed his ability as both a national hunt and flat trainer as he trained a staggering total of 242 winners.

1997 saw O'Brien venture into the Classic history books for the first time notching up wins in the Irish 2000 Guineas and Irish Derby with Desert King and in the Irish 1000 Guineas with Classic Park. 

O'Brien continued to excel in both spheres of horse racing and showed his excellence when training Istabraq to victory in the Champion Hurdle at the Cheltenham Festival in 1998 and retained the title with the JP McManus-owned runner in 1999 and 2000.

At the turn of century, O'Brien was at his peak and had some of racing's top stars in the stables including 2001 Epsom and Irish Derby winner Galileo and 2002 dual Derby winner High Chaparral.

The Irish Derby in particular is a race synonymous with the Ballydoyle supremo and he has trained the winner of the race nine times and has bagged the contest for the last six years.

Johnny Murtagh, Kieren Fallon and Ryan Moore have been integral parts of O'Brien's meteoric rise over the last two decades, but it's his son Joseph who has now taken over the reins of riding some of the stable's superstars.

Fame and Glory and So You Think are just a couple of the star horses at the Ballydoyle stables these days and with the Coolmore Stud providing O'Brien with some strong artillery, he will certainly continue to dominate the Irish racing scene.

Other Leading Flat Trainers

Sir Michael Stoute

Sir Henry Cecil

Richard Hannon

Dermot Weld