[2] He held the record for the most wins in unified title bouts in bantamweight history, at 6, a feat later surpassed by Naoya Inoue at 7.

[3] Olivares made his pro debut at the age of 17 by knocking out Freddy García in round one at Cuernavaca.

Then, on July 29 of that same year, Olivares had the first spot on his record, Germán Bastidas holding him to a ten-round draw.

Olivares' knockout streak ended in that fight, but he won the first installment of the Olivares-Castillo rivalry after rising off the canvas to score a 15-round decision.

Olivares was knocked down once, but he rose to regain the world Featherweight title in the last fight between him and Castillo with another 15-round decision.

[8] Then, he had six more knockouts in a row, including one in a non-title bout in Nicaragua, one in Nagoya, Japan while defending the crown in the rematch for a fight which took place in 1969, won by Olivares by TKO in the 2nd round.

On March 19, 1972, Olivares lost the world's Bantamweight title to another countryman, Rafael Herrera, by a knockout in round eight.

After two non-title wins, he met Alexis Argüello on November 23 of that year, losing the world title by a knockout in round 13.

This time, however, he also lost the title in his first defense, beaten by Ghana's David "Poison" Kotey, who became that nation's first world boxing champion ever by winning a 15-round decision against Olivares.

A seven-round knockout defeat at the hands of future world champion Danny "Little Red" López followed.

[12] After drawing in ten rounds with Guillermo Morales on April 22, 1979, he received what would turn out to be his last world title try: On July 21 of that year, he was knocked out in 12 rounds by WBA world Featherweight champion Eusebio Pedroza in Houston, for the WBA Featherweight title.

[13] Olivares' acting career prolonged for 12 films,[14] including Las Glorias del Gran Puas, a 1984 film based on Olivares' life that also starred an all star Mexican cast including Sasha Montenegro, Carmen Salinas, Manuel "Flaco" Ibáñez, Roberto Guzman, Raul Padilla, Sergio Bustamante and Rafael Inclan among others.