Here is a list of Collazo's best fights.
On July 16, 2022 Oscar Collazo faced off against Vic Saludar in a strawweight bout at age 25. He was coming in with a record of 5-0 (3), and Saludar was 31 years old and with a record of 21-5 (11). Collazo won the fight via 12-round unanimous decision.
On November 16, 2024 Oscar Collazo, the WBO champion, met Thammanoon Niyomtrong, the WBA and The Ring champion, in a strawweight world-title unification fight. Collazo was 27 years old and with a record of 11-0 (8), and Niyomtrong was 34 years old and with a record of 25-0 (9). Collazo stopped Thammanoon Niyomtrong via 7th-round TKO and is crowned the unified WBO, WBA and The Ring champion.
On May 27, 2023 Oscar Collazo fought Melvin Jerusalem in a strawweight world-title fight for Jerusalem's WBO title. Collazo was 26 years old and with a record of 7-0 (5), and Jerusalem was 29 years old and with a record of 20-2 (12). Collazo stopped Melvin Jerusalem via 7th-round retirement and is crowned the new strawweight world champion.
