Kevin Vallejos

Kevin Axel Vallejos Montenegro (born December 8, 2001) is an Argentine mixed martial artist, who competes in the featherweight division of the Ultimate Fighting Championship (UFC). As of June 16, 2026, he is #9 in the Meta UFC featherweight rankings.

Mixed martial arts career Early career Vallejos made his professional mixed martial arts debut in September 2021, defeating Rocco Cena by technical knockout at Supreme Warrior 6. He later competed in the Argentine promotion Samurai Fight House, where he captured multiple regional titles including bantamweight, featherweight, and lightweight championships including a defence over UFC veteran Luiz Eduardo Garagorri.

Dana White's Contender Series After compiling an 11-0 professional record, Vallejos would compete for a UFC contract on Dana White's Contender Series: Season 7, Week 5 on September 6, 2023, but lost a unanimous decision to Jean Silva, marking his first career loss.

After two more wins on the South American regional scene, Vallejos was scheduled to return on Week 7 of Season 8 of Dana White's Contender Series on September 24, 2024, to face Luke Riley. However, Riley had to withdraw from the contest due to visa issues and was subsequently replaced by undefeated prospect Cam Teague. He won the fight via first-round knockout and was awarded a contract by Dana White.

Ultimate Fighting Championship Vallejos made his UFC debut on March 15, 2025 at UFC Fight Night 254, where he defeated Seung Woo Choi by first-round technical knockout.

Vallejos would next face Danny Silva at UFC on ESPN 71 on August 2, 2025. He would win the fight by unanimous decision.

Vallejos would next fight Giga Chikadze in the co-main event of UFC on ESPN 73 on December 13, 2025. Vallejos recorded a knockout victory over Chikadze in the second round with a spinning backfist. This fight earned him a Performance of the Night award.

Vallejos faced Josh Emmett in the main event of UFC Fight Night 269 on March 14, 2026. He won the fight by technical knockout in the first round. This fight earned him a $100,000 Performance of the Night award.

Championships and accomplishments Ultimate Fighting Championship Performance of the Night (Two times)

Samurai Fight House SFH Bantamweight Champion SFH Featherweight Champion SFH Lightweight Champion

Mixed martial arts record Win

Josh Emmett TKO (knees and punches) UFC Fight Night: Emmett vs. Vallejos

Las Vegas, Nevada, United States Win

Giga Chikadze KO (spinning backfist and elbows) UFC on ESPN: Royval vs. Kape

Las Vegas, Nevada, United States Win

Danny Silva Decision (unanimous) UFC on ESPN: Taira vs. Park

Las Vegas, Nevada, United States Win

Choi Seung-woo TKO (punches) UFC Fight Night: Vettori vs. Dolidze 2

Las Vegas, Nevada, United States Win

Cam Teague TKO (punches) Dana White's Contender Series 73

Las Vegas, Nevada, United States Win

Gonzalo Contreras KO (punch) Samurai Fight House 15

Salto, Uruguay Win

Maximiliano Perez Submission (rear-naked choke) Samurai Fight House 14

Buenos Aires, Argentina Loss

Jean Silva Decision (unanimous) Dana White's Contender Series 61

Las Vegas, Nevada, United States Win

Luiz Eduardo Garagorri TKO (elbows and punches) Samurai Fight House 11

Lomas de Zamora, Argentina Win

Natanael Aldo Espindola TKO (punches) Samurai Fight House 10

Buenos Aires, Argentina Win

Nestor Machado Decision (unanimous) Samurai Fight House 8

Santa Fe, Argentina Win

Emmanuel Vallejos TKO (punches) Samurai Fight House 7

San Carlos de Bariloche, Argentina Win

Pablo Etelechea TKO (punches) Samurai Fight House 6

Buenos Aires, Argentina Win

Mauricio Gabriel Flores TKO (punches) Samurai Fight House 5

Buenos Aires, Argentina Win

Gabriel Vargas Submission (rear-naked choke) Samurai Fight House 4

Buenos Aires, Argentina Win

Jesus Ru Decision (unanimous) Circuito Argentino de MMA 7

Mar del Plata, Argentina Win

Lucas Miletich KO (punch) Samurai Fight House 3

Buenos Aires, Argentina Win

Matias Ponce KO (punch) Cobra Fighter 1

Pontevedra, Argentina Win

Rocco Cena KO (punch) Supreme Warriors 6

Buenos Aires, Argentina