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FILE - Kentucky Derby race horse Mendelssohn's trainer Aidan O'Brien walks to see his horse before the 144th running of the Kentucky Oaks horse race at Churchill Downs, May 4, 2018, in Louisville, Ky. (AP Photo/Kiichiro Sato, File)

FILE - Kentucky Derby race horse Mendelssohn's trainer Aidan O'Brien walks to see his horse before the 144th running of the Kentucky Oaks horse race at Churchill Downs, May 4, 2018, in Louisville, Ky. (AP Photo/Kiichiro Sato, File)

FILE - Brian Hernandez Jr. rides Thorpedo Anna to win he 150th running of Kentucky Oaks horse race at Churchill Downs, May 3, 2024, in Louisville, Ky. (AP Photo/Jeff Roberson, File)

FILE - Brian Hernandez Jr. rides Thorpedo Anna to win he 150th running of Kentucky Oaks horse race at Churchill Downs, May 3, 2024, in Louisville, Ky. (AP Photo/Jeff Roberson, File)

FILE - Preakness Stakes winner and Belmont Stakes entrant Seize The Grey cools down following a work out ahead of the 156th running of the Belmont Stakes horse race at Saratoga Race Course, June 5, 2024, in Saratoga Springs, N.Y. (AP Photo/Julia Nikhinson, File)

FILE - Preakness Stakes winner and Belmont Stakes entrant Seize The Grey cools down following a work out ahead of the 156th running of the Belmont Stakes horse race at Saratoga Race Course, June 5, 2024, in Saratoga Springs, N.Y. (AP Photo/Julia Nikhinson, File)

FILE - Irad Ortiz Jr., center, rides White Abarrio to win the Breeders' Cup Classic horse race, Nov. 4, 2023, at Santa Anita Park in Arcadia, Calif. (AP Photo/Mark J. Terrill, File)

FILE - Irad Ortiz Jr., center, rides White Abarrio to win the Breeders' Cup Classic horse race, Nov. 4, 2023, at Santa Anita Park in Arcadia, Calif. (AP Photo/Mark J. Terrill, File)