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.
Athletic Bilbao B
Bilbao Athletic dropped back down to the third level in 1996, but the main squad continued to be nurtured with several players who had spells with the reserves.
After 19 seasons in the Segunda División B, Bilbao Athletic returned to the second tier after defeating Cádiz CF, 3–1 on aggregate, in the promotion playoffs. However in their campaign in the Segunda they were reliant on the same group, a core squad of 20-year-olds who had never played at such a high level before, and despite battling performances in most of their games, a pattern of narrow defeats led to the team finishing bottom and being relegated back down at the first attempt. Somewhat ironically, the promoted teams that season were CD Leganés whose squad included three players on loan from Athletic who would have been eligible to play for Bilbao Athletic that season, as well as the parent club's local rivals Alavés and Osasuna.