Chavez, like most Mexican boxers, completely relinquished an amateur career and became a professional in 1980, at the age of seventeen. His first professional fight he played on February 5, 1980. He beat his first 44 opponents in construction battles. On March 4, 1981, however, it came to a fight against Miguel Ruiz (3 wins, 9 defeats), which was a long time after him. He struck at the end of the first round and was immediately disqualified. The Boxing Committee of Culiacan, who belonged to his manager Ramon Felix, changed the result later in a "knockout victory".