Club de Fútbol Fuenlabrada, S.A.D. is a football club based in Fuenlabrada, Community of Madrid, Spain, that currently competes in Primera División RFEF – Group 1, the third tier of the Spanish league system. It was founded in 1975. It holds home matches at Estadio Fernando Torres.
Betis Deportivo Balompié is a Spanish football team based in Seville, in the autonomous community of Andalusia. Founded in 1942, it is the reserve team of Real Betis and currently plays in Segunda Federación, holding home games at Ciudad Deportiva Luis del Sol, with a capacity of 3,000 seats.
Sociedad Deportiva Beasain is a Spanish football team based in Beasain, in the autonomous community of Basque Country. Founded in 1905 it plays in Segunda División RFEF – Group 2, holding home games at Estadio Loinaz, with a capacity of 6,000 seats.
Club Deportivo Covadonga is a Spanish football team based in Oviedo, in the autonomous community of Asturias. Founded in 1979 it plays in Tercera División RFEF – Group 2, holding home games at Estadio Juan Antonio Álvarez Rabanal, with a 2,000-seat capacity.
Club de Fútbol Rayo Majadahonda is a Spanish football team based in Majadahonda, in the autonomous community of Madrid. Founded in 1976 it plays in Primera División RFEF – Group 1, holding home games at Estadio Cerro del Espino, with a capacity of 3,800 seats.
Real Sporting de Gijón B is a Spanish football club based in Gijón, in the autonomous community of Asturias. Founded in 1960 it is the reserve team of Sporting de Gijón, and currently plays in Tercera Federación – Group 2, holding home games at Escuela de Fútbol de Mareo with a 3,000-seat capacity.
Unión Deportivo Gijón Industrial is a football team based in Gijón in the autonomous community of Asturias. Founded in 1969, it plays in Tercera División RFEF – Group 2. The club's home ground is Santa Cruz, which has a capacity of 2,500 spectators.
Club Deportivo Cayón is a Spanish football club based in Santa María de Cayón, in the autonomous community of Cantabria. Founded in 1915, it plays in Tercera División – Group 3, holding home games at Estadio Fernando Astobiza, which has a capacity of 2,700 spectators.
Real Oviedo Vetusta is a Spanish football club based in Oviedo, in the autonomous community of Asturias. Founded in 1929 as Unión Sportiva Ovetense, it is the reserve team of Real Oviedo, and currently plays in Segunda División RFEF – Group 1, holding home games at El Requexón, with a 3,000-seat capacity.
Unión Deportiva Socuéllamos is a Spanish football team based in Socuéllamos, Ciudad Real, in the autonomous community of Castilla-La Mancha. Founded in 1924, it plays in Segunda División RFEF – Group 5, holding home games at Estadio Paquito Jiménez, with a 2,500-seat capacity.
Unión Deportiva Logroñés, S.A.D. is a Spanish football team based in Logroño, in the autonomous community of La Rioja. Founded in 2009, it currently plays in Primera División RFEF – Group 2, holding home matches at Estadio Las Gaunas, with a capacity of 16,000 seats.
Club Deportivo Basconia is a Spanish football club based in Basauri, Biscay, in the autonomous community of Basque Country. Founded on 14 March 1913, it currently plays in Tercera División RFEF – Group 4, holding home games at Estadio de López Cortázar, with an 8,500-seat capacity. In 1997, they entered into a partnership with Athletic Bilbao to serve as a feeder club for Bilbao and essentially operate as the club's C team.
Extremadura Unión Deportiva "B" is the reserve team of Extremadura UD, a Spanish football club based in Almendralejo, in the autonomous community of Extremadura. Founded in 1986 as Atlético San José Promesas it last played in Tercera División RFEF - Group 14, holding home games at Estadio Tomás de la Hera, with a 3,000-seat capacity.
Unión Deportiva Llanera is a Spanish football club based in Posada de Llanera, in the autonomous community of Asturias. Founded in 1981, it plays in Segunda División RFEF – Group 1, holding home matches at Estadio Pepe Quimarán.
The 2019–20 Segunda División B season was the 43rd since its establishment. Eighty teams participated, distributed in four groups of twenty clubs each. On 11 March 2020, the season of Segunda División B was suspended due to the coronavirus COVID-19 pandemic in Spain.
The 2020 Tercera División play-offs to Segunda División B from Tercera División were the final playoffs for the promotion from 2019–20 Tercera División to 2020–21 Segunda División B. The first four teams in each group took part in the play-off.
Tercera División was the fourth tier of the Spanish football league system. Founded in 1929, it was below the Primera División, the Segunda División, and the semi-professional Segunda División B.
The 2021–22 Primera División RFEF season was the first for the Primera División RFEF, the new third highest level in the Spanish football league system. It succeeded the old Segunda División B, which renamed itself Segunda División RFEF and downgraded to the fourth level in the pyramid. Forty teams participated, divided into two groups of twenty clubs each based on geographical proximity. In each group, the champions automatically promoted to Segunda División and the second to fifth placers played promotion play-offs and the bottom five were relegated to the Segunda División RFEF.
The 2022 Tercera División RFEF play-offs to Segunda División RFEF from Tercera División RFEF will be the final play-offs for the promotion from 2021–22 Tercera División RFEF to 2022–23 Segunda División RFEF.
The 2022–23 Segunda Federación season will be the second for the Segunda Federación, the new fourth highest level in the Spanish football league system. Ninety teams will participate, divided into five groups of eighteen clubs each based on geographical proximity. In each group, the champions automatically promoted to Primera Federación, and the second to fifth placers will play promotion play-offs. The last five teams in each group will be relegated to the Tercera Federación; in addition, the four worst teams classified 13th in their group will play play-offs to define the last two relegation places.
