Kevin Vallejos (18-1, 15) was born in Mar del Plata, Buenos Aires, Argentina on December 8, 2001. At the age of 19 years on September 4, 2021, he made his professional MMA debut against Rocco Cena, winning the fight via 2nd-round KO.
On March 15, 2025, 23-year old Kevin Vallejos made his UFC debut on his 16th professional MMA fight at UFC Fight Night: Vettori vs. Dolidze 2 against Choi Seung-woo, winning the fight in the 1st round via TKO.
Vallejos' last fight was a 1st-round TKO win against Josh Emmett at UFC Fight Night: Emmett vs. Vallejos at age 24 on March 14, 2026. He is on a 7-fight winning streak.
He has fought four times in the UFC, and has a record of 4 wins and 0 losses in the promotion.
Some of Kevin Vallejos' best fights have been against Josh Emmett, Giga Chikadze, Choi Seung-woo, Danny Silva and Luiz Eduardo Garagorri. For details about these fights refer to "Best fights of Kevin Vallejos".
Vallejos has 1 loss on his MMA record. For details about these losses refer to "Kevin Vallejos Losses".
| # | Date | Opponent | Promotion | Weight | Round | Method | Result |
|---|---|---|---|---|---|---|---|
19  | Mar 14, 2026 24 years, 3 months 18-1 (15) | 41 years 19-6 (9) | UFC | FT | 1 | TKO | Win Punches |
18  | Dec 13, 2025 24 years 17-1 (14) | 37 years, 3 months 15-5 (10) | UFC | FT | 2 | KO | Win Spinning backfist and elbows |
17 | Aug 2, 2025 23 years, 7 months 16-1 (13) | Danny Silva | UFC | FT | 3 | UD | Win |
16 | Mar 15, 2025 23 years, 3 months 15-1 (13) | Choi Seung-woo | UFC | FT | 1 | TKO | Win Punches |
15 | Sep 24, 2024 22 years, 9 months 14-1 (12) | Cam Teague | FT | 1 | TKO | Win Punches | |
14 | Mar 2, 2024 22 years, 2 months 13-1 (11) | Gonzalo Contreras | FT | 2 | KO | Win Punch | |
13 | Dec 22, 2023 22 years 12-1 (10) | Maximiliano Perez | FT | 3 | SUB | Win Rear-naked choke | |
12  | Sep 5, 2023 21 years, 8 months 11-1 (9) | 26 years, 8 months 10-2 (10) | FT | 3 | UD | Loss | |
11  | May 13, 2023 21 years, 5 months 11-0 (9) | 33 years, 11 months 14-2 (11) | FT | 2 | TKO | Win Elbows and punches | |
10 | Mar 11, 2023 21 years, 3 months 10-0 (8) | Natanael Aldo Espindola | LT | 1 | TKO | Win Punches | |
9 | Dec 16, 2022 21 years 9-0 (7) | Nestor Machado | FT | 3 | UD | Win | |
8 | Nov 19, 2022 20 years, 11 months 8-0 (7) | Emmanuel Vallejos | FT | 2 | TKO | Win Punches Interim | |
7 | Oct 15, 2022 20 years, 10 months 7-0 (6) | Pablo Etelechea | BT | 1 | TKO | Win Punches | |
6 | Jun 19, 2022 20 years, 6 months 6-0 (5) | Mauricio Gabriel Flores | FT | 1 | TKO | Win Punches | |
5 | May 22, 2022 20 years, 5 months 5-0 (4) | Gabriel Vargas | FT | 1 | SUB | Win Rear-naked choke | |
4 | Mar 12, 2022 20 years, 3 months 4-0 (3) | Jesus Ru | FT | 3 | UD | Win | |
3 | Feb 12, 2022 20 years, 2 months 3-0 (3) | Lucas Miletich | FT | 1 | KO | Win Punch | |
2 | Dec 5, 2021 19 years, 11 months 2-0 (2) | Matias Ponce | FT | 1 | KO | Win Punch | |
1 | Sep 4, 2021 19 years, 8 months 1-0 (1) | Rocco Cena | FT | 2 | KO | Win Punch |
