Oscar Manuel Collazo

Oscar Manuel Collazo, known as "El Pupilo," is a Puerto Rican southpaw competing at minimumweight who has risen to prominence as a unified world champion. At 15-0 (12 KOs), Collazo combines compact size (157 cm) and a tight 155 cm reach with aggressive finishing instincts. He began his professional career in 2020 on regional cards in Puerto Rico and quickly established himself as a knockout artist on the local scene. Early stops on Collazo’s ledger include TKO victories in San Juan in 2020 and a full-distance win at flyweight in 2021. He took a major step forward on December 3, 2021, when he stopped Pedro Villegas in the third round to capture the vacant WBO Latino Minimumweight title in Panama City — his first regional belt and a springboard to bigger assignments. Collazo continued to test himself against experienced opposition, earning a 12-round unanimous decision over Vic Saludar at Crypto.com Arena in Los Angeles in July 2022, a performance that helped position him for a world opportunity. On May 27, 2023, Collazo won the WBO World Minimumweight title, stopping Melvin Jerusalem in the seventh round at Fantasy Springs Resort Casino. That victory marked his arrival on the world stage and began a sequence of title defenses. He retained the WBO strap in San Juan (a seventh-round corner retirement over Garen Diagan), then defended successfully in Phoenix (TKO of Reyneris Gutierrez, January 28, 2024) and in Verona (12-round unanimous decision over Gerardo Zapata, June 7, 2024). Collazo consolidated his status on November 16, 2024, when he unified titles in Riyadh by stopping Thammanoon Niyomtrong in the seventh round to add the WBA (Super) and The Ring Minimumweight championships to his WBO belt. He has since defended the unified titles multiple times, recording knockout wins over Edwin Cano Hernandez (March 29, 2025), Jayson Vayson (September 20, 2025) and Jesus Haro (March 14, 2026). The Haro stoppage is recorded as a KO under the California commission notation used in the supplied sources. Beyond his minimumweight reign, Collazo moved up to 112 lb in June 2026 and claimed the vacant WBO International Flyweight title with a second-round stoppage of Neider Valdez. That victory showcased his ability to carry power as he steps into higher-weight assignments while defending a unified world championship at minimumweight. As of the documented record, Collazo remains the unified WBO/WBA (Super)/The Ring Minimumweight champion, holding a 15-0 record with 12 stoppages and a growing run of international title fights and defenses that have taken him from Puerto Rico to venues across the United States and abroad.