Jon Gaztañaga

Born in Andoain, Gipuzkoa, Gaztañaga was a product of Real Sociedad's youth system. He made his senior debut with their reserves, spending several seasons in the Segunda División B with the side and also achieving promotion from Tercera División in 2010. Gaztañaga made his official debut with the first team on 18 August 2013, replacing fellow youth graduate Gorka Elustondo in the dying minutes of the 2–0 La Liga home win against Getafe. His first appearance in the UEFA Champions League took place on 10 December, as he came on for Mikel González in a 0–1 group-stage defeat to Bayer Leverkusen also at the Anoeta Stadium. In early 2014, Gaztañaga renewed his contract with Real Sociedad until 2016, being promoted to the main squad in May. On 26 January 2015, having featured sparingly during the first half of the campaign, he joined Segunda División club Ponferradina on loan until June. On 9 July 2015, Gaztañaga was loaned to Numancia of the same league for one year. On 22 August 2017, he agreed to a three-year deal with Gimnàstic de Tarragona also from the second tier after becoming a free agent. Gaztañaga terminated his contract with Nàstic on 13 June 2018. On 20 August, he moved abroad for the first time in his career and joined Cypriot First Division side AEL Limassol. He made his debut five days later, coming on for Marko Adamović late into a 1–0 away victory over Ermis Aradippou. Gaztañaga spent 2020–21 in the Romanian Liga I with Viitorul Constanța. On 24 June 2021, he…

Gaztañaga was picked by the Spain under-17 team for the 2008 UEFA European Championship. He started as a stopper in the final against France, which ended with a 4–0 win. Gaztañaga was selected by the under-18 side for the unofficial 2009 Copa del Atlántico, which his country won.

As of 15 January 2023

Real Sociedad B

Tercera División: 2009–10 AEL Limassol

Cypriot Cup: 2018–19 Spain U17

UEFA European Under-17 Championship: 2008