Who won last triple crown of horse racing?
Jim Fitzsimmons and Bob Baffert are the only two trainers to have two horses win the Triple Crown, with Fitzsimmons training the sire/son combination of 1930 winner Gallant Fox and 1935 winner Omaha and Baffert training 2015 winner American Pharoah and 2018 winner Justify. The wins by Fitzsimmons were also the first time that an owner and the first time that a breeder, Belair Stud holding both duties, had a repeat win of the Triple Crown. Calumet Farm is the only other owner with two Triple Crown horses, 1941 winner Whirlaway and 1948 winner Citation. Eddie Arcaro is the only jockey to ride two horses to the Triple Crown, both for Calumet, Whirlaway and Citation. Those two horses' trainers, Ben Jones and Jimmy Jones, were father and son.
Which horse won the last triple crown of horse racing?
Justify
Triple Crown of Thoroughbred Racing (United States)
At 18, Steve Cauthen became the youngest jockey to win the Triple Crown, riding Affirmed in 1978. At 52, Mike Smith became the oldest jockey to win the Triple Crown, riding Justify in 2018.
Which jockey won the last triple crown of horse racing?
Mike Smith
Triple Crown of Thoroughbred Racing (United States)
Jim Fitzsimmons and Bob Baffert are the only two trainers to have two horses win the Triple Crown, with Fitzsimmons training the sire/son combination of 1930 winner Gallant Fox and 1935 winner Omaha and Baffert training 2015 winner American Pharoah and 2018 winner Justify. The wins by Fitzsimmons were also the first time that an owner and the first time that a breeder, Belair Stud holding both duties, had a repeat win of the Triple Crown. Calumet Farm is the only other owner with two Triple Crown horses, 1941 winner Whirlaway and 1948 winner Citation. Eddie Arcaro is the only jockey to ride two horses to the Triple Crown, both for Calumet, Whirlaway and Citation. Those two horses' trainers, Ben Jones and Jimmy Jones, were father and son.
Which trainer won the last triple crown of horse racing?
Bob Baffert
Triple Crown of Thoroughbred Racing (United States)
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Which breeder won the last triple crown of  horse racing?
John D Gunther
Triple Crown of Thoroughbred Racing (United States)
https://en.wikipedia.org/wiki/Triple%20Crown%20of%20Thoroughbred%20Racing%20%28United%20States%29
In the United States, the Triple Crown of Thoroughbred Racing, commonly known as the Triple Crown, is a series of horse races for three-year-old Thoroughbreds, consisting of the Kentucky Derby, Preakness Stakes, and Belmont Stakes.
Triple Crown of Thoroughbred Racing (United States)
In horse racing, a horse is said to have won the Triple Crown if they win the Kentucky Derby, Preakness Stakes, and Belmont Stakes all in the same year. The last triple crown of horse racing occurred in 2018 with the horse Justify. Justify's jockey was Mike Smith, his trainer was Bob Baffert, and his breeder was John D Gunther.