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A son of Aidan O'Brien, Donnacha had just turned 16 when he rode his first winner on his father's Quartz at Dundalk in September, 2014. Big race success quickly came the teenager's way and the following month he landed the Irish Cesarewitch on El Salvador at the Curragh. His first Listed win came in the Saval Beg Stakes at Leopardstown on Kingfisher in June, 2015 and his first Group success came when Order Of St George won the Group 3 Palmerstown House Estate Irish St Leger Trial Stakes at the Curragh on August 20th, 2016.
But better was to come at the same course on Longines Irish Champions Weekend the following month when Donnacha captured his first Group 1 win on Intricately, trained by his brother Joseph, in the Moyglare Stud Stakes. The filly, bred by their mother Anne Marie, was also giving Joseph his first training success at the highest level. He was crowned champion apprentice rider at the end of the 2016 season. Donnacha rode out his claim when successful on his father's San Remo in the Dundalk Stadium Handicap at Dundalk on Wednesday, April 12th, 2017.
Donnacha was 19 years old when he landed his first Classic victory when partnering Saxon Warrior, trained by Aidan O'Brien, to win the QIPCO 2,000 Guineas at Newmarket on May 5, 2018. At the end of the following month, he won his first Dubai Duty Free Irish Derby at the Curragh when Latrobe prevailed in a thrilling renewal. Donnacha's brother Joseph trained the winner which beat horses trained by Aidan O'Brien into second, third, fourth and fifth places.
Dubai Duty Free Irish Derby (Group 1) (Latrobe - 2018)
Moyglare Stud Stakes (Group 1) (Happily - 2017)
Moyglare Stud Stakes (Group 1) (Intricately - 2016)
Breast Cancer Research Debutante Stakes (Group 2) (Magical - 2017)
Irish Stallion Farms EBF 'Ahonoora' Hcap (Baraweez - 2015)
Irish Cesarewitch (El Salvador - 2014)
Paddy's Rewards Club Stakes (Group 3) (Rostropovich - 2018)
Irish Stallion Farms EBF Nasrullah H'cap (Lucius Tiberius - 2018)
Willis Towers Watson Champions Juv. Stks (Group 3) (Nelson - 2017)
Flame Of Tara Irish EBF Stakes (Group 3) (Just Wonderful (USA) - 2018)
Irish Stallion Farms EBF Yeats Stakes (Listed) (Southern France - 2018)
Coolmore War Command Rochestown Stks (Listed) (True Blue Moon - 2017)
John Sisk & Son Round Tower Stakes (Group 3) (Ten Sovereigns - 2018)
Comer Group Irish St Leger Trial Stakes (Flag Of Honour - 2018)
Koffy.ie Diamond Stakes (Group 3) (War Decree (USA) - 2017)
Palmerstown Irish St Leger Trial Stakes (Group 3) (Order Of St George - 2016)
Qatar Racing Phoenix Sprint Stakes (Group 3) (Speak In Colours (GB) - 2018)
P.W.McGrath Memorial Ballysax Stakes (Group 3) (Nelson - 2018)
Killavullan Stakes (Group 3) (Kenya - 2017)
Arthur Guinness Irish EBF Corrib(F)Stks (Listed) (Music Box - 2017)
*Statistics are up to close of business the previous day. Prize-money is allocated within 1 week of the race date (allow 1 week for Prize-money).
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