Gene St. Leon (born c. 1955 in Hutchinson, Kansas) is a retired Champion jockey in American Thoroughbred horse racing.In 1971 he was among the recipients of the newly created Eclipse Award program when he was voted that year's Outstanding Apprentice Jockey. He was inducted in Calder Race Course Hall of Fame in 1995. During his career he won a record 1,310 races at Calder, a record that stood until it was broken in June 2009 by Eduardo Nunez. St.