Since running his first horse in a Breeders’ Cup race in 1998, Aidan O’Brien has won 18 Breeders’ Cup races, second only to Hall of Famer D. Wayne Lukas’ 20 wins. His Breeders’ Cup horses have earned more than $33.8 million, trailing only the stable tally of Hall of Famer Bob Baffert, another 18-time winner with more than $40.3 million.