Álex Darío Aguinaga Garzón (Spanish pronunciation: [ˈaleks aɣiˈnaɣa], born 9 July 1969) is an Ecuadorian former professional football player and manager.

Necaxa would go on to participate in the first edition of the FIFA Club World Cup where in the group stage Aguinaga scored against Vasco da Gama, but missed a penalty against Manchester United.

He would captain the team for a number of years and assisted in the goal by Iván Kaviedes that assured Ecuador's first qualification to the FIFA World Cup in 2002, in which he played.

Aguinaga's managerial career began in late 2010 as an assistant to Manuel Lapuente at Mexican club América.

In March of the same year, he was named to his first full-time managerial post as the new manager of Guayaquil-based club Barcelona following the sacking of Rubén Darío Insúa.