All horses entered in the Breeders' Cup who were selected for random prerace testing for banned blood-enhancing drugs tested negative, Breeders' Cup officials said Wednesday.
Breeders' Cup collected blood samples from the horses on Oct. 15, the day that pre-entries were taken. The samples were taken from horses who were on the grounds at Monmouth Park, the location of this year's Breeders' Cup, and also at other racetracks and training centers in the United States and overseas.