After suffering his first defeat against Olivares, Chacon won his next four bouts, then faced off against cross-town rival and future champion Danny Lopez.

On September 7, 1974, Chacon won the vacant WBC Featherweight title by defeating former WBA Junior Lightweight champion Alfredo Marcano in nine rounds at the Grand Olympic Auditorium in Los Angeles.

Chacon rebounded by scoring victories over Ignacio Campos, Augie Pantellas, Gerald Hayes and Shig Fukuyama.

In November 1979, Chacon received a shot at the WBC title, versus world champion Alexis Argüello.

Arguello defeated him by a devastating knock out after Chacon sustained a bad cut in the seventh round.

Limón then beat Idelfonso Bethelmy by a knockout in 15 in Los Angeles to win the WBC world Jr. Lightweight championship.

She pleaded for him to leave the sport but was unsuccessful, and the night before he boxed Salvador Ugalde, she shot and killed herself with a rifle.

[5] About one and a half years after his wife's suicide, Chacon remarried and bought a large farm with a mansion and, according to what he said at an interview, about 40 horses.

In between, he and Boza Edwards met for a second time, with his world title on the line, in what The Ring called 1983's fight of the year.

The announcers, including Ferdie Pacheco, were explicit in saying the fight should be stopped because of the pounding Chacon endured.

But Chacon came back to drop Boza Edwards in round twelve and avenge his earlier defeat to the Ugandan former champion.

[4] In 1996, he was spotted at a public appearance in Phoenix, Arizona, to see the fight between Oscar De La Hoya and Julio César Chávez.