[1] By early 2010, Delgado was named for Millonarios FC to be the second goalkeeper, but because of the bad work of one goalkeeper of the Bogota club, Juan Obelar, received the opportunity[2] and he stayed with the job demonstrating great condition and earning the affection of the fans albiazul.

With the arrival of Nelson Ramos in 2011 the ambassador team, Delgado was relegated to backup job without this decimated their effort and commitment to the club.

For the same period, his wife Tatiana is valued medically with breast cancer, so the keeper decides to wear a haircut (shaved) in support of women with this disease.

That was how the December 16, 2012, he won the Colombian professional title 2012 Categoría Primera A season with the shirt of Millonarios beating Medellín in a final that was defined in criminal and where Delgado scored the last penalty to Millonarios and interrupted the penalty that ultimately would give the team championship Bogotá.

[6] By the end of 2014, he was widely criticized for errors in games, so for the 2015 lost the title with the keeper Nicolas Vikonis acting alone in the Copa Colombia.