Ascenso MX

Ascenso MX, officially as Ascenso BBVA MX for sponsorship reasons, was a professional association football league in Mexico and the second level of the Mexican football league system. Formerly known as Primera División "A" de México (1994–2009) and Liga de Ascenso de México (2009–2012). The season was divided into two tournaments: Apertura (from July to December) and Clausura (from January to May). The champions of each tournament were decided by a final knockout phase, commonly known as Liguilla. The league was held 50 editions. The inaugural edition was the 1994–95 season, with Atlético Celaya crowned as the first champions. The final edition was the Clausura 2020 tournament, which was declared unfinished due to the COVID-19 pandemic. The clubs promoted to Liga MX were the winners of the Campeón de Ascenso between the two champions of the season. The bottom club was relegated to Liga Premier. Twenty-seven clubs won the title at least once. Dorados de Sinaloa, León, Irapuato and Necaxa were the most successful clubs with four titles each, Querétaro with three titles.