Delgado then joined L.D.U. Quito, a team regularly featuring in the Copa Sudamericana and Copa Libertadores. With his new club, Tin again returned to scoring form and with his goal exploits, he helped Liga surprisingly reach the quarterfinals of the 2006 Copa Libertadores. Delgado was one of eleven players banned for between 2 and 12 months for taking part in a vicious brawl at the end of LDU's 1–1 draw at home to Barcelona on 17 December 2006. Four Barcelona players were injured in the incident on the last day of the season which shocked the country and overshadowed the title won by El Nacional. The Ecuadorian Football Federation (FEF) said on its web site that the incident started with a clash between Delgado and his marker, Víctor Montoya. Montoya later denied that he had deliberately kicked Delgado's injured knee and received no sanction from the FEF. Delgado later said in the National Congress of Ecuador that he had been persecuted by the FEF.