Athletic Bilbao B
Bilbao Athletic, officially named Athletic Club "B", is the reserve team of Athletic Bilbao, a football club based in Bilbao, in the autonomous community of Basque Country. The team will play in the Segunda División B in the 2018–19 season. Founded in 1964, the team holds home matches at the small stadium attached to the club's training facility at Lezama, or occasionally at San Mamés Stadium, with its 53,500-seat capacity, for important fixtures.
La Liga
In April 1927, José María Acha, a director at Arenas Club de Getxo, first proposed the idea of a national league in Spain. After much debate about the size of the league and who would take part, the Real Federación Española de Fútbol eventually agreed on the ten teams who would form the first "Primera División" in 1929. Barcelona, Real Madrid, Athletic Bilbao, Real Sociedad, Arenas Club de Getxo and Real Unión were all selected as previous winners of the Copa del Rey. Atlético Madrid, Espanyol and Europa qualified as Copa del Rey runners-up and Racing de Santander qualified through a knockout competition. Only three of the founding clubs, Real Madrid, Barcelona and Athletic Bilbao, have never been relegated from the "Primera División".