1973 Belmont Stakes meant he completed the Triple Crown of Thoroughbred Racing. This was significant as he was the ninth horse to complete the feat and broke a 25-year drought where a horse failed to complete the achievement. Secretariat, Sham, Pvt. Smiles, and My Gallant were the first four horses to be entered into the Belmont Stakes. Secretariat, winner of both the Kentucky Derby and the Preakness Stakes, was the odds on favorite to win the event. The added distance of the Belmont when compared to the Derby and Preakness was found to be one potential reason for Secretariat to lose the race.
Kentucky Derby changed to the first Saturday in May to allow for a specific schedule for the Triple Crown races. Since 1931, the order of Triple Crown races has been the Kentucky Derby first, followed by the Preakness Stakes and then the Belmont Stakes. Prior to 1931, eleven times the Preakness was run before the Derby. On May 12, 1917 and again on May 13, 1922, the Preakness and the Derby were run on the same day. On eleven occasions the Belmont Stakes was run before the Preakness Stakes. On May 16, 1925, the first live radio broadcast of the Kentucky Derby