In December 2009 , AZ signed the Rican goalkeeper from Deportivo Saprissa , the youngster moved to the Netherlands in July 2010 .
Alvarado made his Saprissa debut , in a 3 - 1 win over Municipal Liberia on 29 November 2009 .
In December 2009 , AZ signed the Rican goalkeeper from Saprissa   , the youngster moved to the Netherlands in July 2010 .
Alvarado made his Saprissa debut , in a 3 - 1 win over Municipal Liberia on 29 November 2009 .