Tomoya Tsuboi TKO8 Carlos Cuadras... Earlier this week, former 115-pound champion Carlos “Príncipe” Cuadras announced his retirement from professional boxing after suffering an eighth-round technical knockout defeat to Japan’s Tomoya Tsuboi in Tokyo. That loss occurred the week before.Tsuboi is 29 years old but just 3-0 as a professional. He is a former national amateur champion of Japan. “I’m even with boxing. It gave me everything and I gave it everything,” Cuadras said, making clear that his decision is final. He plans to enjoy time with his family and remain connected to the sport in a different capacity. Cuadras made his debut in 2008 and reached the pinnacle of his career in 2014 when he captured the WBC super flyweight world title. He defended the belt six times, establishing himself as one of the most prominent names in the division throughout the last decade. He retires with a record of 44 wins, 6 losses, 1 draw, and 28 knockouts.

 

Boxingtalk salutes Cuadras and wishes him a successful and satisfying retirement. Throughout his career, Cuadras faced challenges both inside and outside the ring, including a period of rehabilitation that he overcame before returning to win an interim belt in 2023. His last victory came in May 2025, fueling hopes of another world title run.