5 historical facts and figures about the Kentucky Derby [Video]

This week marks the 151st Kentucky Derby race — the first of three horse races that make up the Triple Crown.On Saturday, 20 horses will line up at Churchill Downs in Louisville to run the 1.25-mile track in what the derby calls “the most exciting two minutes in sports.”Will there be any records broken this year? That will be known at the end of the day Saturday. For now, here are five data points about the history of the Kentucky Derby.Fastest winnersJust two horses out of 150 winners have completed the race in less than two minutes — Secretariat in 1973 and Monarchos in 2001. One horse, Northern Dancer, did complete the one-and-a-quarter-mile track in exactly two minutes. After Secretariat’s record time of one minute and 59.4 seconds, the horse went on to win the Preakness Stakes in Baltimore and the Belmont Stakes in New York, completing the Triple Crown …