However, after playing as home beating 5–1 to O'Higgins, drawing 1–1 with Deportes Iquique to finally defeat Ñublense as visitor 3–2 in Chillán that allowed Macul based-side qualify the playoffs in the 8th place (last position to qualify) where Castillo play all this games only being replaced by Raúl Olivares against O'Higgins in the 73rd minute. Not obstant Colo-Colo was eliminated by Católica in the quarterfinals after loss 4–2 at Monumental and a 1–1 draw at Estadio Nacional of which Castillo played both. On 18 June, once finished the Apertura was reported that Gallego would studying the possibility of Castillo's disappointing of the club to use his foreign bid in a midfielder to face the Torneo Clausura. On 28 June, was announced the 23-man Copa América squad where Castillo and his teammate Scotti were nominated by coach Oscar Washington Tabarez.