 His debut came on 15 October 2006, as he came on as a substitute for Pablo Orbaiz in the 58th minute of the 3–2 away win against Gimnàstic de Tarragona; during his spell at the San Mamés Stadium, he was mainly restricted to Copa del Rey matches.In the following summer, Iturriaga was released by Athletic and signed with Segunda División team UD Salamanca where he was also highly unsuccessful, going on to serve two loans in Segunda División B, including one at SD Lemona.In 2009, he left but stayed in the Biscay area, moving to amateurs Club Portugalete.