Cardozo has contributed to the many achievements that Boca Juniors have accomplished since he signed for them, including a Copa Libertadores title, two Copa Sudamericana and Recopa Sudamericana titles, the Argentine Torneo de Apertura title of 2005 and the Torneo de Clausura title of 2006. He too was a part of the Boca squad which played in the 2007 FIFA Club World Cup in Japan, Cardozo scored in the semi-final 1–0 victory against Tunisian side Étoile Sportive du Sahel before losing 4–2 in the final against AC Milan.