The club was founded on August 15, 1928. The club gained fame in the early 1930s by defeating local clubs in such a way that the board of directors tried to enroll the club in Mexican Primera División. It was not until 1943 when the club and the club's state of Guanajuato joined forces and created Union-Leon, which later become Club León. The club went on to keep the club's name and the colors and in 1967 joined the Segunda División Profesional.[1] In the 1970-1971 tournament, the club finished 7th overall. In 1971-1972 the club finished one point away from being relegated. In 1972-1973 the club finished 8th overall.
In 1974-1975 they managed to qualify for the playoffs beating Club Leon 1-0, but fell to Toluca, who went on to become the champion that year.
