Nicknamed El Oso (Bear), he played most of his career in Spain, especially with Albacete Balompié, being part of the club's most long tenure in La Liga.
After the 1986 FIFA World Cup he joined Mexican club Universidad Autónoma de Guadalajara where, in his first year, he was the highest goalscorer of the tournament with 23 goals overall.
He started his spell at the Castilla–La Mancha team in the second level, scoring 15 times in all 38 matches in an eventual promotion – including two crucial ones against UD Salamanca.
[1][2] During 1991–92's La Liga, Zalazar again played in all the games, adding 13 goals and helping Albacete finish in seventh place, the highest position ever reached by the club in the top division.
Having made his official debut on 13 June 1984 against England in a 2–0 win, he was part of the squad at the 1986 FIFA World Cup, making his only appearance of the tournament during the second half of a group stage 1–6 loss to Denmark.