Liga Nacional de Fútbol Americano
Liga Nacional de Fútbol Americano is the name of the top gridiron league which operates in Spain. It was first founded in 1988 and reorganized in 1995 after the merge of several previous Spanish competitions.
The league is run by the Spanish Federation of American Football.
At the end of the season, league champion and runner up clinch bids to compete at next year's European Football League, while third and fourth teams classify for the EFAF Cup.
There has been changes in the number of teams throughout the years. Since 2015, teams are divided into three categories: Serie A, with the top six teams, second tier Serie B with ten teams competing in two conferences, and Serie C, with regional and interregional leagues.
LNFA Serie B
The Serie B is the second division of the LNFA. It was created in 2012 and named originally as LNFA while the top league was called LNFA Elite. In 2014, it changed the name to Serie B.LNFA Serie C
The Serie C is the third division of the LNFA. It was created in 2015 with the aim to get more teams in the national leagues.| Year | Champion | Runner-up | |
| 2015 | Gijón Mariners | Alicante Sharks | 13–0 |
| 2016 | Rivas Osos | Las Rozas Black Demons | 18–0 |
| 2017 | Camioneros de Coslada | Alicante Sharks | 40–0 |