(foaled 1938), American racehorse (Thoroughbred) who in 1941 captured the U.S. Triple Crown—the Kentucky Derby, the Preakness Stakes, and the Belmont Stakes. A chestnut colt distinguished by an unusually long tail, he was sired by Blenheim II (an English-bred horse) out of Dustwhirl. Noted for his spectacular finishes, he won 32 of 60 races, finished out of the money only four times, and was the first horse to earn more than half a million dollars. He established a Kentucky Derby record (subsequently broken). Retired to stud in 1943 because of a leg injury, he sired 17 stakes winners.