 Born in Moscow from Spanish parents that, while still children, had been sent to Russia in 1937 due to the Spanish Civil War, Iriondo returned to Spain in 1957 at the age of four.He only played lower league football during his whole career, representing CDC Moscardó, CP Amorós, RCD Carabanchel, AD Alcorcón, Valdemoro CF and Tomelloso CF, retiring with the latter in 1982 at the age of 28.Iriondo started his managerial career at AD Villaviciosa de Odón in the regional leagues, and moved to CD Móstoles' youth setup in 1991.