Mario Valenzuela Osuna (born March 10, 1977) is a former professional baseball outfielder.
Valenzuela played for the Chicago White Sox minor league affiliates, beginning in 1996 at the age of 19 by playing in the Rookie League and eventually achieving Triple-A level in 2004.
In the Mexican Baseball League, Valenzuela played for the Saraperos de Saltillo (2005 - 2008), the Diablos Rojos del México (2009 - 2014), and the Guerreros de Oaxaca (2014 - 2017).
For the 2009 World Baseball Classic edition, he joined Team Mexico as a replacement player for the injured Erubiel Durazo, going hitless in four at bats.
This biographical article relating to a Mexican baseball outfielder is a stub.