Seattle Slew (February 15, 1974 – May 7, 2002) was an American Thoroughbred race horse who won the Triple Crown in 1977….while becoming the tenth of thirteen horses to accomplish the feat….and is one of two horses to have won the Triple Crown while having been undefeated in any previous race….as the second was Justify….who won the Triple Crown in 2018….and was a descendant from Seattle Slew.
Seattle Slew was a horse that was honored as the 1977 Horse of the Year….who was also a champion at ages two, three, and four….and was ranked 9th in the Blood-Horse magazine List of the Top 100 U.S. Racehorses of the 20th Century.
Joe Hirsch of the Daily Racing Form wrote of his three-year-old campaign that “Every time he ran he was an odds-on favorite, and the response to his presence on the racetrack, either for a morning workout or a major race, was electric. ‘Slewmania’ was a virulent and widespread condition.”
Seattle Slew later became an outstanding sire and broodmare sire, leading the North American sire list in 1984 when his son Swale won the Kentucky Derby and Belmont Stakes. Another son, A.P. Indy, won the Belmont Stakes and continued the sire line through descendants such as Mineshaft, Tapit, and California Chrome.