 On 15 July 2010, after rejecting a new contract at "Ponfe", Mandi signed for Real Madrid Castilla also in the third level.After again winning promotion to the second tier, he moved to Sporting de Gijón on 22 June 2012 after agreeing to a four-year deal.Mandi made his professional debut on 2 September 2012, starting in a 0–0 away draw against Racing de Santander.