Oscar Collazo (boxer)

During his seven-year amateur career, Collazo won five national amateur boxing titles, the bronze medal the 2017 Panamerican Championships and the gold medal at the 2019 Pan American Games.[2][3][4]

Collazo made his professional debut as a light flyweight against Vicente Castro Cheneque on 15 February 2020.[5] He won the fight by a third-round technical knockout.[6] Collazo was next booked to face Kevin John Cruz Jusino on 5 December 2020.[7] He won his second professional bout a round quicker than his first, as he won the fight by a second-round technical knockout.[8]

Collazo moved up to flyweight for his next bout, against Francisco Bonilla on 25 March 2021, on the Amanda Serrano vs. Daniela Romina Bermúdez undercard.[9] He won the fight by a career-first unanimous decision, with all three judges scoring the fight 60–54 in his favor.[10] Collazo moved down to mini flyweight to face Pedro Villegas for the vacant WBO Latino minimumweight title on 3 December 2021.[11] He won the fight by a third-round technical knockout.[12]

Collazo faced the former WBO and WBA (Regular) mini-flyweight champion Vic Saludar in a WBA mini-flyweight title eliminator. The fight was booked for the undercard of the Javier Fortuna lightweight bout, which took place on July 16, 2022.[13] Collazo won the fight by unanimous decision, with two scorecards of 116–112 and one scorecard of 118–110. Both fighters were knocked down in the sixth round, Saludar with a two-punch combination and Collazo with a right uppercut.[14]

Collazo was expected to face the former WBO mini flyweight titlist Wilfredo Méndez in a WBO mini-flyweight title eliminator on January 28, 2023, on the undercard of the Alexis Rocha and Anthony Young welterweight bout, which took place at the YouTube Theater in Inglewood, California.[15] Méndez was forced to withdraw from the bout on January 15, due to a back injury sustained in training. He was replaced by Yudel Reyes, who stepped in on two-week's notice.[16] Collazo stopped his opponent with a left hook at the 2:59 minute mark of the fifth round. He had knocked Reyes down with a right hook in the previous round.[17]

On January 30, 2023, the WBO ordered their mini-flyweight champion Melvin Jerusalem make a mandatory title defense against Collazo.[18] As the they failed to reach a deal within the 30-day negotiation period, the sanctioning body scheduled a purse bid for February 23.[19] It was declared deserted for failure to comply with purse bid terms, rescheduled for February 27,[20] and eventually won by Golden Boy Promotions and Cotto Promotions with a bid of $152,000.[21]