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
Kentucky Derby to its approximate duration. It is the first leg of the American Triple Crown and is followed by the Preakness Stakes, then the Belmont Stakes. Unlike the Preakness and Belmont Stakes, which took hiatuses in 1891–1893 and 1911–1912, respectively, the Kentucky Derby has been run every consecutive year since 1875. The Derby, Preakness and Belmont all were run even every year throughout both World Wars, when the Olympics and nearly all professional sports seasons were canceled, due to the fact that nearly all the athletes enlisted. A horse must win all three races to win the Triple Crown. In the