Real Sociedad de Fútbol "B" (also known as Sanse) is a Spanish football team based in San Sebastián, in the autonomous community of Basque Country.

[1] After quickly gaining promotion to the third tier to become part of the national football pyramid, a name change was required to differentiate them from the senior team, and San Sebastián Club de Fútbol was chosen.

In 1992, a change in rules forced the team to change its name, and it was renamed Real Sociedad de Fútbol B. Liga de Fútbol Profesional's rules prohibit B clubs from having different names from their parent club, the exceptions being Real Madrid Castilla and Sevilla Atlético.

Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.

Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.