From Sir Barton in 1919 to Justify in 2018, just 13 horses have managed to sweep the American Triple Crown – the Kentucky Derby, Preakness Stakes, and Belmont Stakes. Triple Crown winners 1919     Sir Barton           1930     Gallant Fox        1935     Omaha  1937     War Admiral      1941     Whirlaway         1943     Count Fleet        1946     Assault  1948     Citation 1973     Secretariat         1977     Seattle Slew       1978     Affirmed             2015     American Pharoah          2018     Justify Download free Daily Racing Form lifetime past performances for the Triple Crown winners HERE.