Born in
Rosario, Argentina, Delgado started his career at
Rosario Central. He joined
Cruz Azul for the
2003 Apertura, where he finished with 16 appearances and eight goals. Delgado made 21 appearances in the subsequent
Apertura, again scoring eight goals. In the
2004 Apertura, Delgado scored another six goals in 15 games. On 8 January 2008, Delgado moved to French club Lyon who paid a transfer fee of €11 million. He made his
Ligue 1 debut on 20 January 2008 against
RC Lens. Delgado came on as an 85th-minute substitute
Lisandro López on 21 October 2009 against
Liverpool in the
UEFA Champions League and scored the winning goal in a 2–1 victory. It was Lyon's first win in the UEFA Champions League against English opposition. On 10 June 2011, Delgado signed with
C.F. Monterrey, and participated in the 2011 Mexican League Apertura, CONCACAF Champions League and Club World Cup tournaments. ==International career==