Track workers treat Mongolian Groom after the Breeders’ Cup Classic horse race at Santa Anita Park, Saturday, Nov. 2, 2019, in Arcadia, Calif. Jockey Abel Cedillo, right, eased him up near the eighth pole in the stretch. The on-call vet says he has "serious" injury to leg. Was taken to equine hospital on the grounds. (AP Photo/Mark J. Terrill)