Segunda División RFEF
Segunda División RFEF (), also officially known as Segunda B-Segunda RFEF, is the fourth tier of the Spanish football league system containing 90 teams divided into five groups. It is administered by the Royal Spanish Football Federation. It is the second tier outside the top two professional leagues, the "Primera División" (also known as La Liga) and the "Segunda División", being behind the "Primera División RFEF" and above the "Tercera División RFEF". The division also includes the reserve teams of a number of La Liga and Segunda División teams. History. On 6 May 2020, the RFEF announced  the creation of a new, two-group, 40-team third division called Primera División RFEF, which resulted in the former third division, Segunda División B, dropping down a level and changing into Segunda División RFEF; the changes were made effective for the 2021–22 campaign. Current format. Segunda División RFEF currently features 90 teams divided into 5 groups of 18. The champions of each group achieve automatic promotion to Primera División RFEF, while the other top four teams are qualified to a play-off round, where five of the 20 teams qualified also achieve promotion. However reserve teams are only eligible  for promotion to the "Primera RFEF" if their senior team is in one division above it. The bottom five teams in each group are relegated to the Tercera División RFEF. Also, the four worst 13th-placed teams enter into relegation play-offs to determine the two teams to be relegated. Eligibility of players. Each team of Segunda División RFEF can have 22 players in their roster, with these two limitations: Groups. The member clubs of the Segunda División RFEF for the 2021–22 season are listed below.