The Grand Slam of Thoroughbred racing is an informal name for winning four major Thoroughbred horse races in one season in the United States. The term has been applied to two configurations of races,
American Pharoah has been the only winner of a Breeder's Cup Classic Grand Slam
Whirlaway won the Travers Stakes Grand Slam in 1941, and is the only horse to accomplish the feat.
Man O'War won the Preakness, Belmont, and Travers but did not race in the 1920 Kentucky Derby.
American Pharoah won the Breeders' Cup Classic Grand Slam in 2015 and was the first and currently only horse to accomplish the feat.
American Pharoah
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American Pharoah is a Thoroughbred racehorse who won the American Triple Crown and the Breeders' Cup Classic in 2015. He was the 12th Triple Crown winner in history, and in winning all four races, bec
American Pharoah led throughout the 2015 Preakness, which was run on a very sloppy track.
American Pharoah led Frosted for much of the run in the Travers Stakes.