 Arriving at RCD Espanyol in July 2002, Iraizoz spent two seasons with its B-side, also having a loan spell at SD Eibar in the second division.He made his La Liga debut on 21 December 2005, in a 2–1 away win against Deportivo de La Coruña.He was Espanyol's second-choice behind Carlos Kameni for the 2006–07 season, but was the regular in the club's run to the final of the UEFA Cup, notably excelling in the quarter-final second leg away to S.L.