Seabiscuit was a champion thoroughbred racehorse in the United States who became the top money-winning racehorse up to the 1940s. He beat the 1937 Triple Crown winner, War Admiral, by four lengths in a two-horse special at Pimlico and was voted American Horse of the Year for 1938.

War Admiral was a champion American Thoroughbred racehorse who is the fourth winner of the American Triple Crown. He was also the 1937 Horse of the Year and well known as the rival of Seabiscuit in the "Match Race of the Century" in 1938. War Admiral won 21 of his 26 starts with earnings of $273,240 and was the leading sire in North America for 1945. He was also an outstanding broodmare sire whose influence is still felt today in descendants such as Triple Crown winners American Pharoah and Justify.