Born in Elgoibar, Gipuzkoa, Etxeberria began his career with Real Sociedad, making his La Liga debut at only 17 in a 2–0 home win against RCD Español on 29 January 1995. That summer, he moved to neighbouring Athletic Bilbao in a controversial transfer that cost over €3 million and caused the clubs to break off formal relations– at the time, it was the highest transfer fee paid for an under-18 player in Spanish football. When he returned to Anoeta Stadium in 2001, the Real Sociedad supporters prepared banners of his face on banknotes denoting him as a 'mercenary', and when he scored they responded with a hail of bottles and verbal abuse which earned the organization a fine from the Royal Spanish Football Federation. In 1997–98, Etxeberria scored 11 league goals as Athletic finished second, achieving a career-best 14 five seasons later. He netted the goal that took his team into the group stage of the UEFA Champions League as they overcame FC Dinamo Tbilisi on the away goals rule, and repeated the feat in that phase of the competition against Rosenborg BK ; in his first 12 years he never appeared in less than 28 league games, his lowest scoring output being three in the 2004–05 and 2006–07 campaigns, while he was also eventually awarded team captaincy. On 1 October 2008, already playing second-fiddle, Etxeberria agreed a deal with the Basque side according to which he effectively played 2009–10, his last season as a professional, for free, after his contract expired in June 2009. Etxeberria's last year was not a successful one individually as he only appeared in seven league matches, adding another seven with two goals in the season's UEFA Europa League, including his final for the club against C.D. Nacional in the group phase of the UEFA Europa League on 5 November 2009. On 15 May 2010 he was replaced to a standing ovation in Athletic's 2–0 home win against Deportivo de La Coruña, and represented his main club in 514 official matches, third-best in its history only behind José Ángel Iribar and Txetxu Rojo. Etxeberria's testimonial match at the San Mamés Stadium was played against 200 children, and he scored twice in a 5–3 win.
Etxeberria began a coaching career after retiring, his first job being with the Basque Country representative youth teams. In 2012 he returned to Athletic, starting out at the youth academy; having spent so many years at the club as a player, he described the Lezamatraining centre as a "second home". In 2015, Etxeberria moved to the first team under manager Ernesto Valverde. The following year he was appointed at affiliate CD Basconia, controlling a group of players he had previously managed at the Juvenilage group level. In summer 2017, Etxberria departed from the Athletic internal structure whilst remaining contracted to the club and moved within the same region to become manager of third-tier side SD Amorebieta, replacing the departed Aitor Larrazábal. On 5 February of the following year, he replaced fired José Luis Martí at the helm of CD Tenerife. In May 2018, Athletic Bilbao confirmed that Etxeberria had cut all ties with the club to continue his coaching career independently. On 17 September, he was fired by Tenerife after the team failed to record a victory in the first five league matches of the season. Etxeberria returned to the Athletic Bilbao staff in late May 2019, now as head coach of the reserve team Bilbao Athletic, on a two-year contract.
Personal life
Etxeberria was not related to former Athletic teammate Imanol Etxeberria. Coincidentally, they were raised just a few miles from one another.
