Trainer brothers Donnacha (far left) and Joseph O’Brien enjoying a chat at the King Abdulaziz racecourse in Riyadh. They had watched their wards wrap up their final workouts ahead of their assignments ...

When Ireland's Aidan O'Brien takes aim at some Breeders' Cup history Oct. 31-Nov. 1, some of his competition will come from sons Joseph and Donnacha. The elder O'Brien, who will begin that pursuit ...

Oct. 27 (UPI) --Watch out for the Irish colts and fillies on Friday's Breeders' Cup Future Stars program for 2-year-olds at Del Mar. Trainer Aidan O'Brien's yard, loaded all year with budding talent, ...

Irish training legend Aidan O'Brien, known as "The Master of Ballydoyle" and victorious in more than 400 grade/group 1 races, is now known for being the winningest trainer in Breeders' Cup history.

Trainer Aidan O'Brien notched his 25th Group 1 win of the year Sunday in France when Pierre Bonnard won the Critérium de Saint-Cloud, capping a top-level double on the card following Puerto Rico's ...

Aidan O'Brien became the all-time leading trainer at the Breeders’ Cup on Friday as Gstaad landed the Juvenile Turf at Del Mar under Christophe Soumillon. The Wexford native overtakes the late D.