
John Riel Casimero
- WINS34
- Losses5
- Draws1
- ko's23
- AliasQuadro Alas
- Height163
- Reach163
- Division
- Super Bantamweight
- Age
- 36
- Country
- Philippines
- Born in
- Ormoc City
- KO PERCENTAGE
- 67.65%
- Bouts
- 40
- ROUNDS BOXED
- 263
- Stance
- O
John Riel Casimero FIGHTS
LOSS
VSKyonosukeKameda15-5-2October 25, 2025Bishkek Arena, Bishkek, , KyrgyzstanJohn Riel Casimero LOSES to Kyonosuke Kameda
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Biography
Early Life and Introduction to Boxing
John Riel Casimero, born on February 13, 1989, in Ormoc City, Leyte, Philippines, found himself drawn to the world of boxing from a young age. Growing up in a country with a rich boxing tradition, Casimero was inspired by the legendary Filipino boxers who had left an indelible mark on the sport. His early years were marked by a deep fascination with the sweet science, fueled by a desire to emulate his heroes and carve out his own path in the ring.
Casimero’s introduction to boxing came at a pivotal moment in his life. At the age of 10, he was introduced to the sport by his uncle, who recognized his natural talent and encouraged him to pursue boxing as a means of self-discipline and personal development. Embracing the opportunity with unwavering determination, Casimero dedicated himself to the rigors of training, honing his skills and sharpening his instincts under the guidance of his uncle.
As Casimero immersed himself in the world of boxing, his passion for the sport continued to grow. He quickly made a name for himself in the local amateur circuit, showcasing his speed, agility, and power in the ring. With each victory, Casimero gained confidence and momentum, fueling his aspirations of one day becoming a world champion.
Casimero’s journey from the streets of Ormoc City to the pinnacle of professional boxing is a testament to his unwavering dedication and unyielding spirit. Fueled by a burning desire to succeed, he overcame numerous obstacles and setbacks along the way, emerging stronger and more determined with each challenge he faced. As he set his sights on the world stage, Casimero carried with him the lessons and values instilled in him during his formative years, propelling him towards greatness in the sport he loves.
Amateur Career
John Riel Casimero’s journey to boxing stardom began in the amateur ranks, where he quickly established himself as a formidable force to be reckoned with. With a blend of natural talent, grit, and determination, Casimero embarked on a path that would lay the foundation for his future success in the professional arena.
Casimero’s amateur career was marked by a series of impressive performances and notable achievements. Competing in various national and international tournaments, he showcased his skills against top-notch opponents, earning accolades and recognition along the way. His style, characterized by lightning-fast hand speed and devastating power, made him a feared competitor in the ring.
One of the highlights of Casimero’s amateur career came when he captured the gold medal at the 2007 Southeast Asian Games in Thailand. Displaying his mastery of the sweet science, he navigated through a highly competitive field to emerge victorious, cementing his status as one of the region’s most promising boxing talents.
Another significant moment in Casimero’s amateur journey was his participation in the 2008 Beijing Olympics. Representing the Philippines on the world stage, he faced off against some of the best amateur boxers from around the globe, showcasing his skills and resilience in the face of stiff competition. Though he fell short of medal contention, his performance served as a valuable learning experience and a stepping stone for his future endeavors.
Throughout his amateur career, Casimero amassed an impressive record and gained invaluable experience that would serve him well in his transition to the professional ranks. His time in the amateur circuit not only honed his boxing skills but also instilled in him the discipline, perseverance, and mental toughness needed to succeed at the highest levels of the sport. As he set his sights on the professional stage, Casimero carried with him the lessons and memories of his amateur days, laying the groundwork for a remarkable journey that would see him become a multi-weight world champion.
Professional Success
Casimero’s journey to boxing glory began with his professional debut on May 4, 2007, against Romeo Jakosalem, where he secured a victory via TKO. This marked the start of an impressive ascent through the ranks of the boxing world. Throughout his career, Casimero has faced a series of tough opponents, each contributing to his development as a fighter. Among his notable early fights was his clash with César Canchila on April 6, 2008, which ended in a loss via unanimous decision. However, Casimero rebounded from setbacks, showcasing his resilience and determination.
In a pivotal moment in his career on December 19, 2009, Casimero defeated César Canchila in a rematch, this time claiming victory by technical knockout to clinch the interim WBO light flyweight title. This triumph signaled Casimero’s arrival on the world stage and set the stage for his future accomplishments. Casimero’s career trajectory continued with notable victories and title defenses, including his successful defense of the interim IBF junior flyweight title against Luis Alberto Lazarte on February 11, 2012. However, his journey also saw setbacks, such as his loss to Moruti Mthalane for the IBF flyweight title on March 26, 2011.
Undeterred by challenges, Casimero demonstrated his resilience and skill, capturing the IBF flyweight title in a rematch against Amnat Ruenroeng on May 25, 2016. This victory marked a significant milestone in his career, solidifying his status as a two-division world champion. Casimero’s pursuit of greatness led him to the bantamweight division, where he achieved further success. On November 30, 2019, he secured a stunning victory over Zolani Tete, claiming the WBO bantamweight title and becoming a three-division world champion.
In subsequent bouts, including his defense against Duke Micah on September 26, 2020, Casimero showcased his exceptional skill and punching power, reaffirming his status as a dominant force in the ring. His victory over Guillermo Rigondeaux on August 14, 2021, further solidified his reputation as one of the top fighters in the world. As of his most recent bout on December 3, 2022, where he secured a knockout victory against Ryo Akaho, Casimero continues to electrify audiences with his performances, cementing his legacy as one of the Philippines’ finest boxers.
John Riel Casimero’s return to the Philippines was met with triumph as he seized victory over Namibia’s Fillipus Nghitumbwa to claim the WBO Global super bantamweight title. The bout took place on May 13, 2023, at the grand Okada Manila in Paranaque City. In front of a fervent hometown crowd, Casimero delivered a masterful performance, showcasing his skills and tenacity to secure a unanimous decision win. With this victory, Casimero not only added another title to his impressive collection but also reaffirmed his status as a dominant force in the super bantamweight division.
Following his successful homecoming, Casimero ventured to Japan for his much-anticipated debut in the Land of the Rising Sun. On October 12, 2023, at the prestigious Ariake Arena in Tokyo, Casimero faced off against former IBF super bantamweight champion Yukinori Oguni in a highly anticipated showdown. The atmosphere was electric as fans eagerly awaited the clash between two skilled warriors. However, the bout took an unexpected turn when an accidental headbutt occurred, leading to a Controversial Technical Draw. Despite the inconclusive result, Casimero’s performance showcased his adaptability and resilience in the face of adversity, leaving fans eager to see what the future holds for the Filipino boxing sensation on the international stage.


