Juan Carlos Valenzuela Hernández[a] (born 15 May 1984) is a Mexican former professional footballer who played as a centre-back.

In Clausura 2008 he was acquired by Tecos where his performance arouse the interest of Club América and the Mexico national team.

The newly appointed manager, Miguel Herrera chose Valenzuela because of their experience together in his ex team Club America.

He made the preliminary list for the 2010 World Cup, getting cut prior to their "farewell" game in Mexico City.

In October 2013, Valenzuela was called up to play the World Cup intercontinental playoff matches against New Zealand by Miguel Herrera.