Diego moved the following season to Deportes Temuco, Salas' team cross-town rivals, and then he moved to Barnechea, amateur team where was scouted by Unión San Felipe, first-tier club, with which relegated to Primera B in 2012, having very well performances despite of that, among which highlighted a penalty saved to Esteban Paredes in a 1–0 away loss against Colo-Colo at Monumental.