1973 Kentucky Derby entered the homestretch, Secretariat passed Sham in the final furlong and distanced himself to consolidate his lead. Secretariat would go on to win the Preakness Stakes and Belmont Stakes in the succeeding weeks, thus becoming the ninth horse to complete the Triple Crown of Thoroughbred Racing. Thirteen horses entered the Derby, which could have at most twenty participants. Horse owners had to pay a final entry fee of $2,500 to have their horses officially entered. The field was larger than anticipated because of new entries following Secretariat's loss at the Wood Memorial Stakes in New York. The Wood Memorial had
Animal Kingdom (horse) Animal Kingdom (horse) Animal Kingdom (foaled in Kentucky on March 20, 2008) is an American Thoroughbred racehorse best known for winning the 137th Kentucky Derby and the 2013 Dubai World Cup. His Derby win took place on May 7, 2011, before a record crowd of 164,858. After the Derby, Animal Kingdom finished second in the Preakness Stakes and sixth in the Belmont Stakes before his career was disrupted by injury. He returned to finish second in the 2012 Breeders' Cup Mile before winning the Dubai World Cup as a five-year-old in 2013. Animal Kingdom is the first Kentucky Derby winner