 The undefeated Graustark's racing career ended with a broken coffin bone in the Blue Grass Stakes, and an injury kept Buckpasser out of the Triple Crown races.Even after Kauai King's wins in the Kentucky Derby and the Preakness Stakes, there was much speculation as to which was the better horse.On June 27, 1966, Kauai King (against the advice of his trainer, Henry Forrest) and Buckpasser met in the Arlington Classic.