 In 2010, Irwin's horse Pluck, which he bred from a South African mare he had earlier imported, won the Breeders' Cup Juvenile Turf.In 2011, Irwin's horse, Animal Kingdom, which he bred from a German mare he had earlier imported, won the 137th Kentucky Derby.The Derby winner's sire, the Brazilian-bred horse Leroidesanimaux, had earlier been purchased for stud duty by Barry Irwin on behalf of a Kentucky breeding farm.