AdvertisementWhy Is It So Hard For A Horse To Win The Triple Crown?June 03, 2014Joel RosefacebookEmailBirdstone (right), ridden by Edgar Prado, upsets horse Smarty Jones to win the Belmont Stakes in 2004. Smarty Jones was one of a dozen horses since 1978 to win the first two legs of the Triple Crown, only to lose at the Belmont. (Getty Images)
