 In his arrival he was assigned with the kit number 1, previously worn by Francisco Prieto, the club's 2010 first choice keeper marginated by coach Diego Cagna to face the season.At Chilean club, Castillo was reunited with his national team teammate Andrés Scotti and on 9 January joined the club's pre-season in La Serena alongside Colo-Colo's another signing Agustín Alayes where he declared