Because of his breeding, Cañonero II qualified for the
Kentucky Derby, the most prestigious event in United States Thoroughbred horse racing. Trained by Juan Arias and ridden by
jockey Gustavo Avila, in the spring of 1971, the horse was shipped to
Louisville, Kentucky, for the big race. There, Cañonero II was dismissed as a horse that did not belong in such elite company and was listed at the bottom of the pack of the betting odds as part of a six-horse pool. In the Derby's 20-horse field, Cañonero II shocked everyone by coming from 18th place to storm past the competition, easily winning the race by 3 lengths. Arguably the most astonishing upset in the race's history was deemed a fluke by many of horse racing's experts, who predicted Cañonero II would never win another race. However, in the
Preakness Stakes, the second of the
Triple Crown races, Cañonero II won again. The third leg of the Triple Crown, the
Belmont Stakes held near
New York City, was run before the largest crowd in its history. The stands were filled with members of the city's large
Latino community, there to cheer on their new hero. However, due to a foot infection that had bothered the horse for several days, Cañonero II, after taking the race lead, struggled across the finish line in fourth place. Despite this loss, he was named the winner of the 1971
Eclipse Award for Outstanding Three-Year-Old Male Horse. ==Later career==