2015 Kentucky Derby the lead in the homestretch. The race marked the fourth Kentucky Derby win for horse trainer Bob Baffert and the third win for Espinoza. The Kentucky Derby is a race for 3-year-old Thoroughbred horses. The 2015 field was determined by a points system that was introduced in 2013. The post position draw of the entries for the Kentucky Derby was held on Wednesday, April 29, 2015, at the Churchill Downs Racetrack clubhouse. American Pharoah was installed as the 5-2 morning line favorite. The day after the draw, Todd Pletcher scratched Stanford, stating that the horse was "fine" but they were
American Quarter Horse from 220 to 870 yards. Thus, they have long legs and are leaner than their stock type counterparts, but are still characterized by muscular hindquarters and powerful legs. Quarter Horses race primarily against other Quarter Horses, and their sprinting ability has earned them the nickname, "the world's fastest athlete." The show hunter type is slimmer, even more closely resembling a Thoroughbred, usually reflecting a higher percentage of appendix breeding. They are shown in hunter/jumper classes at both breed shows and in open USEF-rated horse show competition. There are several genetic diseases of concern to Quarter Horse breeders: American Quarter Horse