Clyde Van Dusen (1885 – January 8, 1951) was an American jockey and trainer of Thoroughbred racehorses best known for winning the 1929 Kentucky Derby.Following a career as a jockey, Van Dusen turned to training. Handling the racing stable of Amsterdam, New York businessman, Herbert P. Gardner, in 1929 Clyde Van Dusen became the only trainer to ever win the Kentucky Derby with a horse named in their honor. The gelding, Clyde Van Dusen, was the first son of Man o' War to win the Kentucky Derby.