Kevin Vallejos Record: 18-1-0

UFC arrival

Vallejos made his Octagon debut count in March 2025, blitzing Seung Woo Choi with a first-round TKO. He backed it up in August 2025 with a unanimous-decision win over previously one-loss prospect Danny Silva, showing he could also win on the scorecards when a finish didn't come.

Breakout 2025-26

The young Argentine then announced himself as a real contender. In December 2025 he stopped striking specialist Giga Chikadze with a spectacular second-round knockout via spinning backfist and elbows, a finish that signaled his arrival against ranked opposition. He followed it in March 2026 with arguably his biggest result yet, a first-round TKO of powerful veteran Josh Emmett in a main-event spot – a historic moment for Argentine MMA that pushed his record to a sparkling 18-1.

Fighting style

Vallejos is a pure finisher with an 83% finish rate, and the breakdown tells the story – 13 of his 18 wins have come by knockout, with two submissions and just three decisions. His boxing-rooted striking is heavy, accurate and creative, capable of conventional power shots and flashier weapons alike, as the spinning-backfist knockout of Chikadze demonstrated. He has also shown a submission game and the ability to grind out decisions when needed. The only loss of his career came by decision to a high-level opponent, and at just 24 he remains relatively unproven against the deepest tier of the division – but the trajectory, and the highlight-reel finishes, point to a fighter with a high ceiling.

Career highlights

• Knockout of the Night-caliber finish — stopped ranked striker Giga Chikadze with a spinning backfist and elbows in December 2025, his breakout moment.
• Main-event statement — finished veteran Josh Emmett by first-round TKO in March 2026 in a historic spotlight for Argentine MMA.
• Elite finishing rate — an 18-1 record with 13 knockouts, an 83% finish rate that marks him as one of the division's most dangerous young talents.