in january 2008, aguirre was loaned to real valladolid, being unsuccessful during a one 1/2 year stint, as he was mainly used as a substitute. he did, however, score on the last day of the 2008–09 season in a crucial relegation match away to real betis which ended 1–1, after having replaced injured pedro león. betis eventually relegated with that draw, but the castile and león outfit maintained its status. upon the end of his loan spell, aguirre returned to lanús in 2009.