An exercise rider gallops a thoroughbred around the track during a workout at Belmont Park, Tuesday, June 5, 2018, in Elmont, N.Y. Justify will attempt to become the 13th Triple Crown winner when he runs in the 150th running of the Belmont Stakes horse race on Saturday. Ninety-nine years ago, a horse named Sir Barton became the first winner of the Triple Crown. It was Sir Barton’s fourth win in a span of 32 days, with the first and second being the Kentucky Derby and Preakness Stakes.