|Full name||Alain Eizmendi Blanco|
|Date of birth||10 June 1990|
|Place of birth||Beasain, Spain|
|Height||1.73 m (5 ft 8 in)|
|2008–2011||Real Sociedad B||66||(9)|
|2013–2014||→ Eibar (loan)||28||(2)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 14 October 2018|
Born in Beasain, Basque Country, Eizmendi joined Real Sociedad's youth system in 2002, aged 12. He made his senior debut in the 2008–09 season, playing for the reserves in Segunda División B and being relegated; on 20 June 2009 he made his professional debut with the first team, coming on as a second-half substitute in a 2–1 away win against Elche CF for the Segunda División championship.
On 30 June 2011, Eizmendi rejected a contract extension and signed a two-year deal with neighbouring Athletic Bilbao, being assigned to B-team also in the third level. In his second year, he scored a career-best seven goals in 31 matches as the club failed to promote in the playoffs; on 19 June 2013, he was released.
Eizmendi returned to Real Sociedad in July 2013, being subsequently loaned to SD Eibar. On 17 July 2014, after achieving promotion to La Liga, he agreed to a one-year contract at CD Leganés; he renewed his link with the latter on 9 July of the following year, and won another promotion at the end of the season.
- Elustondo da la última victoria a los 'txuri urdin' (Elustondo gives last win to the txuri urdin); Marca, 20 June 2009 (in Spanish)
- Alain Eizmendi: «Quiero un nuevo ascenso, esta vez a Segunda con el Unión» (Alain Eizmendi: «I want a new promotion, this time to Segunda with Unión»); El Diario Vasco, 31 October 2016 (in Spanish)
- Alain Eizmendi: ”La oferta del Athletic considero que es mejor para mí deportivamente.” (Alain Eizmendi: "I think Athletic's offer is better for me sportswise.") Archived 29 October 2013 at the Wayback Machine; Erreala, 30 June 2011 (in Spanish)
- Releases in Bilbao Athletic Archived 2013-10-29 at the Wayback Machine; Athletic Bilbao, 19 June 2013
- Eizmendi ficha por la Real y acaba en el Eibar (Eizmendi signs for Real and ends up with Eibar); El Desmarque, 17 July 2013 (in Spanish)
- El extremo Eizmendi llega a Butarque tras brillar con el Eibar en su ascenso a Primera (Winger Eizmendi arrives at Butarque after shining with Eibar in their promotion to Primera); CD Leganés, 17 July 2014 (in Spanish)
- Alain Eizmendi, renovado (Alain Eizmendi, renewed); CD Leganés, 9 July 2016 (in Spanish)
- El extremo Eneko Eizmendi ficha por el Betis B (Winger Eneko Eizmendi signs for Betis B); El Correo, 8 June 2012 (in Spanish)
- El Toledo contrata a Eneko Eizmendi del Real Betis B (Toledo hire Eneko Eizmendi from Real Betis B); CD Toledo, 27 July 2014 (in Spanish)
- LA RESACA: El gol une a los Eizmendi (THE HANGOVER: Goal unites the Eizmendis); Mundo Deportivo, 8 November 2016 (in Spanish)
- "Francisco Javier Eizmendi: Ya para siempre... El gol de Eizmendi..." [Francisco Javier Eizmendi: Always and forever... Eizmendi's goal...] (in Spanish). Blog 80 Burgos. 18 March 2011. Retrieved 3 November 2017.
- "2ªB: Eneko Eizmendi llega para reforzar la mediapunta del ALBACETE" [2ªB: Eneko Eizmendi arrives to bolster ALBACETE attacking midfielder position] (in Spanish). El Digital Castilla La Mancha. 6 July 2016. Archived from the original on 7 November 2017. Retrieved 3 November 2017.
- "Eizmendi: Francisco Javier Eizmendi Urdangarín". BDFutbol. Retrieved 3 November 2017.