|Full name||Josu Sarriegi Zumarraga|
|Date of birth||19 January 1979|
|Place of birth||Lazkao, Spain|
|Height||1.85 m (6 ft 1 in)|
|Playing position||Centre back|
|2002–2003||→ Eibar (loan)||28||(1)|
|* Senior club appearances and goals counted for the domestic league only|
In his country he played professionally with Alavés, Eibar and Athletic Bilbao, appearing in 71 La Liga games over the course of four seasons. He added 78 matches in Segunda División (five goals in total).
From 2007 until his retirement, Sarriegi represented Greece's Panathinaikos.
Sarriegi was born in Lazkao, Gipuzkoa. After having first appeared professionally with modest and amateur Basque clubs, he signed for Deportivo Alavés in 1999, making his first-team debut on 18 February 2001 in a 1–0 away win against CA Osasuna.
After a loan with neighbours SD Eibar in the second division, Sarriegi renewed his contract for a further three years, then played 28 games in the 2004–05 season as Alavés returned to La Liga after two years of absence. In the following campaign he was first-choice, but his team was relegated again.
Having missed only two league matches with another Basque side, Athletic Bilbao, in 2006–07, Sarriegi joined Greece's Panathinaikos FC in August 2007. On 26 November of the following year he scored the winning goal for the Athens club as it defeated Inter Milan 1–0 at the San Siro, in a UEFA Champions League group stage match.
On 9 July 2010, after appearing regularly during three years, 31-year-old Sarriegi extended his contract for a further two seasons. The following year, after the departures of Djibril Cissé and Gilberto Silva, he was voted by his teammates as the new captain.
- Victoria inteligente (Smart win); Mundo Deportivo, 19 February 2001 (in Spanish)
- Josu Sarriegi continuará tres años más en Vitoria (Josu Sarriegi will continue a further three years in Vitoria); Diario AS, 30 July 2004 (in Spanish)
- Sarriegi se marcha al Panathinaikos (Sarriegi goes to Panathinaikos) Archived 7 November 2014 at the Wayback Machine; Marca, 10 August 2007 (in Spanish)
- Inter progress despite Panathinaikos loss; UEFA.com, 26 November 2008
- Ανανέωσε ο Σαριέγκι (Sarriegi renewed); Gazzetta, 9 July 2010 (in Greek)