Julio César Chávez González, also known as Julio César Chávez Sr., is a Mexican former professional boxer who competed from 1980 to 2005. A multiple-time world champion in three weight divisions, Chávez was listed by "The Ring" magazine as the world's best boxer, pound for pound, from 1990 to 1993.

In 2010 he was inducted into the International Boxing Hall of Fame for the Class of 2011.

Julio César Chávez was born on July 12, 1962, in Ciudad Obregón, Sonora, Mexico. His father, Rodolfo Chavez, worked for the railroad, and Julio grew up in an abandoned railroad car with his five sisters and four brothers. Chávez came from a poor family and became a boxer for money. He began boxing as an amateur at the age of 16 and he then moved to Tijuana to pursue a professional career. Chávez made his professional debut at age 17.

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