Wikipedia
The Organización Nacional Estudiantil de Futbol Americano , usually known by the acronym ONEFA, is the major college football league in Mexico.
American football has been played in Mexico since the early 1920s in different colleges and universities, mainly in Mexico City. In 1928 the first professional championship was played, organized by Jorge Braniff. From the 1920s to the 1970s more universities and colleges joined the championship, and four categories, called fuerzas were created. The First Fuerza became the National League in 1970, and in 1978 it was reorganized under the name ONEFA.
In 2010 a breakaway league, CONADEIP, was formed by the Monterrey Tech system and two other private universities.
The universities that originally participated in the ONEFA were Universidad Autónoma de Nuevo León, Universidad Autónoma de Chapingo, Instituto Politécnico Nacional, Universidad Autónoma de Coahuila, Universidad Autónoma de Chihuahua and Universidad Autónoma Agraria Antonio Narro.
Today the ONEFA is formed by 100 teams divided into four categories: Liga Mayor (College), Liga Intermedia (Undergrad/ Varsity High School, Liga Juvenil (two categories- Junior High/ Middle School), and "Liga Infantil" (six categories- Middle School/ Elementary School).
The most important one is the Liga Mayor (Major League- College Level), whose championships, until 2014, were organized into two conferences: the Big 8 Conference, and the National Conference. The champion of the National Conference was promoted to the Big 8 Conference taking the spot of the team in last place which, in turn, was relegated to the National Conference. For the 2015 season, there are 19 teams participating divided in 3 conferences: Green, White, and Red. The teams from the Green and the White conferences are elegible to play for the National Championship.