The Serie B is a Mexican association football league. Fifteen teams compete in one group. Since the 2024–25 season, it is two tournament per season. The top 8 teams advances directly to the Liguilla to play for promotion to Liga Premier – Serie A, and the stadium must meet the requirements to promote as well. In the 2020–21 season, Serie B was on hiatus due to COVID-19, but Serie B was reactivated for the 2021–22 season.
Teams for 2024–25 season
Below are listed the member clubs of the Serie B for the 2024-25 season.[4]
On June 28, 2024 the league format was modified, the two tournaments per season were reinstated after one year with a single-season tournament.[13]
On June 28, 2024 Real Zamora rejoined the league after Inter de Querétaro returned the franchise rights. On July 24 the team was relocated to Serie B. On August 20, 2024 the team was moved to La Piedad.[14]