Urtzi Iriondo

Born in Zeberio, Biscay, Basque Country, Iriondo joined Athletic Bilbao's youth setup in 2005, aged ten. Iriondo made his debuts as a senior with the farm team in the 2013–14 campaign, in Tercera División. On 26 May 2014, Iriondo was promoted to the reserves in Segunda División B. He contributed with 14 appearances and one goal during the season, as the B-side returned to Segunda División after a 19-year absence. Iriondo made his professional debut on 24 August 2015, starting in a 0–1 home loss against Girona FC. He scored his first goal as a professional on 24 April of the following year, netting his team's second in a 2–3 loss at UD Almería. On 1 July 2016, Iriondo was loaned to Elche CF also in the second level, for one year. The following 30 June, after suffering relegation, he moved to fellow league team Granada CF also on a temporary one-year deal.

Iriondo's identical twin brother Eneko Iriondo is also a footballer. A midfielder, he was also part of the Athletic youth setup.