Mario Thomas Barrios, born May 18, 1995, in Racine, Wisconsin, is a Mexican-American professional boxer known as the "Aztec Warrior" or "El Azteca." He moved to San Antonio, Texas, at a young age, which he considers his hometown, and turned pro on November 11, 2013.[2][3][5] Barrios first captured a world title in the super lightweight division (140 lbs), winning the vacant WBA (Regular) title on September 28, 2019, by unanimous decision over Batyr Akhmedov, despite a controversial outcome and two knockdowns in a grueling fight.[2] He held that belt until 2021. Moving up to welterweight (147 lbs), he secured the interim WBC welterweight title on September 30, 2023, with a dominant unanimous decision over former champion Yordenis Ugas, including two knockdowns.[5] He defended it on May 4, 2024, defeating Fabian Maidana by unanimous decision (116-111 on all cards) in the co-main event to Canelo Alvarez vs. Jaime Munguia at T-Mobile Arena.[2][5] As of recent records, Barrios holds the full WBC welterweight title since 2024 and maintains an undefeated streak in his latest bouts, with a pro record of 29-2-2 and 18 knockouts.[2][5] A two-division world champion, Barrios is ranked among boxing's top welterweights and remains highly relevant in the sport. Beyond the ring, he engages in philanthropy in San Antonio, partnering with figures like attorney Thomas J. Henry on community initiatives for underserved children, while pursuing interests in fashion, music, and indigenous rights advocacy.[3] His resilience, power, and marketability position him for major upcoming fights.[5]