 The "A" was composed by Club Deportivo Guadalajara, Atlas de Guadalajara, Club Nacional de Guadalajara, Club Marte and Club Latino, The "B" by Club Colón, Oriente, Imperio and CD Oro due to the inferior level of these teams compared to those in the "A" Division.In 1943 when the professional football era began in Mexico, CD Oro missed the opportunity to join the league, however other teams in the Guadalajara metropolitan area region such as Club Deportivo Guadalajara, Atlas de Guadalajara did get an invitation that year.CD Oro saw this events as a wake-up call to get an invitation into the professionalism.