Fair Play was an American-bred Thoroughbred racehorse who was successful on the track, but even more so when retired to stud. He is best known as the sire of Man o' War, widely considered one of the greatest American racehorses of all time. On the racetrack, Fair Play was known for his rivalry with the undefeated Colin, to whom he finished second in the Belmont Stakes. Later, Fair Play was the leading sire in North America of 1920, 1924 and 1927, and the leading broodmare sire of 1931, 1934 and 1938. He was inducted into the National Museum of Racing and Hall of Fame in 1956.

Man o' War was an American Thoroughbred racehorse who is widely regarded as one of the greatest racehorses of all time. Several sports publications, including The Blood-Horse, Sports Illustrated, and the Associated Press, voted Man o' War as the best American racehorse of the 20th century. During his racing career, just after World War I, Man o' War won 20 of 21 races and $249,465 in purses. He was the unofficial 1920 American horse of the year and was honored with Babe Ruth as the outstanding athlete of the year by The New York Times. He was inducted into the National Museum of Racing and Hall of Fame in 1957. On March 29, 2017, the museum opened a special exhibit in his honor, "Man o' War at 100".