On November 16, 2024, the 27-year-old WBO strawweight champion, Oscar Collazo (10-0, 7 KOs), and the 34-year-old WBA and The Ring strawweight champion Thammanoon Niyomtrong (25-0, 9 KOs) met in a title-unification fight.
Collazo came in to the fight on a 10-fight win streak with a 70% KO rate, and was fighting after a gap of 5 months and 9 days. Niyomtrong was on a 25-fight win streak with a 36% KO rate, and fighting after a layoff of 2 months and 9 days.
Oscar Collazo stopped Thammanoon Niyomtrong via TKO in the 7th round of the 12-round world-title fight and unified the WBO, WBA, and The Ring strawweight titles. Collazo improves his record to 11-0 (8 KOs), while Niyomtrong adds a loss to his record at 25-1.
On May 27, 2023, a 26-year-old Oscar Collazo (6-0, 4 KOs) got a shot at the WBO strawweight title held by 29-year-old Filipino boxer Melvin Jerusalem (20-2, 12 KOs).
Collazo came in to the fight on a 6-fight win streak with a 66% KO rate, and was fighting after a gap of 3 months and 29 days. Jerusalem was on a 9-fight win streak with a 54% KO rate, and fighting after a layoff of 4 months and 21 days.
The champion refused to continue the fight in the 7th round, and Oscar Collazo is crowned the new WBO strawweight world champion — in his first world-title fight. Collazo improves his record to 7-0 (5 KOs), while Jerusalem adds a loss to his record at 20-3.
On January 28, 2024, the 27-year-old WBO strawweight world champion, Oscar Collazo (8-0, 6 KOs), faced Reyneris Gutierrez, in a title defense fight.
Collazo came in to the fight on a 8-fight win streak with a 75% KO rate, and was fighting after a gap of 5 months and 2 days.
Oscar Collazo made easy work of Reyneris Gutierrez, stopping the challenger via TKO in the 3rd. Collazo improves his record to 9-0 (7 KOs)
On August 26, 2023, the 26-year-old WBO strawweight world champion, Oscar Collazo (7-0, 5 KOs), faced Garen Diagan, in a title defense fight.
Collazo came in to the fight on a 7-fight win streak with a 71% KO rate, and was fighting after a gap of 2 months and 30 days.
The challenger refused to continue the fight in the 6th round, and Oscar Collazo is crowned the new strawweight world champion. Collazo improves his record to 8-0 (6 KOs)
On June 7, 2024, the 27-year-old WBO strawweight world champion, Oscar Collazo (9-0, 7 KOs), faced Gerardo Zapata, in a title defense fight.
Collazo came in to the fight on a 9-fight win streak with a 77% KO rate, and was fighting after a gap of 4 months and 10 days.
Oscar Collazo defeated Gerardo Zapata via unanimous decision and successfully defended his WBO strawweight title. Collazo improves his record to 10-0
On December 3, 2021, a 24-year-old Oscar Collazo (3-0, 2 KOs) and Pedro Villegas met in the ring in a strawweight bout.
Collazo came in to the fight on a 3-fight win streak with a 66% KO rate, and was fighting after a gap of 8 months and 8 days.
Oscar Collazo stopped Pedro Villegas via TKO in the 3rd round. Collazo improves his record to 4-0 (3 KOs)
On December 5, 2020, a 23-year-old Oscar Collazo (1-0, 1 KO) and Kevin John Cruz Jusino met in the ring.
Collazo came in to the fight on a 1-fight win streak with a 100% KO rate, and was fighting after a gap of 9 months and 20 days.
Oscar Collazo stopped Kevin John Cruz Jusino via TKO in the 2nd round. Collazo improves his record to 2-0 (2 KOs)
On January 28, 2023, a 26-year-old Oscar Collazo (5-0, 3 KOs) and Yudel Reyes met in the ring.
Collazo came in to the fight on a 5-fight win streak with a 60% KO rate, and was fighting after a gap of 6 months and 12 days.
Oscar Collazo stopped Yudel Reyes via KO in the 5th round. Collazo improves his record to 6-0 (4 KOs)
On July 16, 2022, a 25-year-old Oscar Collazo (4-0, 3 KOs) and a 31-year-old Filipino boxer Vic Saludar (21-5, 11 KOs) met in the ring.
Collazo came in to the fight on a 4-fight win streak with a 75% KO rate, and was fighting after a gap of 7 months and 13 days. Saludar was on a -1-fight win streak with a 42% KO rate, and fighting after a layoff of 6 months and 25 days.
Oscar Collazo defeated Vic Saludar via unanimous decision in the 12-round fight. Collazo improves his record to 5-0, while Saludar adds a loss to his record at 21-6.
On March 25, 2021, a 24-year-old Oscar Collazo (2-0, 2 KOs) and Francisco Bonilla met in the ring.
Collazo came in to the fight on a 2-fight win streak with a 100% KO rate, and was fighting after a gap of 3 months and 20 days.
Oscar Collazo defeated Francisco Bonilla via unanimous decision in the 6-round fight. Collazo improves his record to 3-0