A look at the horses and jockeys that have won the Triple Crown

Victor Espinoza reacts after crossing the finish line with American Pharoah to win the 147th running of the Belmont Stakes horse race at Belmont Park, Saturday, June 6, 2015, in Elmont, N.Y. American Pharoah is the first horse to win the Triple Crown since Affirmed won it in 1978. (AP Photo/Kathy Willens)

In 1973, Secretariat and Ron Turcotte dominated the Triple Crown races like no other horse and rider before or since. Here they win the Kentucky Derby. (Source: AP) (AP2011)

The first Triple Crown winner, 1919's Sir Barton with rider Johnny Loftus before competing in the Preakness Stakes. (Source: Public domain) (AP Photo)

Earl Sande atop 1930 Triple Crown winner, Gallant Fox. (Source: AP)

Willie Saunders holding the roses after winning the 1935 Kentucky Derby on Omaha. (Source: via YouTube)

Charles Kurtsinger on 1937 Triple Crown winner, War Admiral, after winning the Kentucky Derby. Today War Admiral is almost as famous for having lost a match race to Seabiscuit at Pimlico in 1938. (Source: via YouTube)

Eddie Arcaro on Whirlaway after winning the 1941 Preakness Stakes. (Source: AP)

Johnny Longden rides Count Fleet, the 1943 Triple Crown winner. (Source: AP)

Jockey Warren Mehrtens removes the saddle from 1946 Triple Crown winner, Assault. (Source: AP)

Eddie Arcaro, who rode Whirlaway to the Triple Crown seven years earlier, became the only jockey to win the Triple Crown twice in 1948, aboard Citation. (Source: AP)

Twenty-five years after Citation, Secretariat and Ron Turcotte overwhelmed the field at the Belmont Stakes, winning by 31 lengths. (Source: AP)

In 1977, Jean Cruguet rode Seattle Slew to the Triple Crown. (Source: AP)

The great Steve Cauthen riding the equally great Affirmed to victory at the 1978 Kentucky Derby. (Source: AP)