UFC Fight Night 254 video: Top prospect Kevin Vallejos TKOs SeungWoo Choi in debut

Kevin Vallejos showed why there’s hype around his name in his octagon debut against SeungWoo Choi at UFC Fight Night 254.

After earning a UFC contract through Dana White’s Contender Series, Vallejos (15-1 MMA, 1-0 UFC) made a major first impression when he hurt Choi (11-6 MMA, 4-5 UFC) with a massive punch then swarmed for the TKO at the 3:09. mark of Round 1.

The 23-year-old has been touted as having grate promise, and his performnace was a strong opening statement to his UFC career. Check out the replay of the stoppage below (via X):

MASSIVE right leads to the finish for Kevin Vallejos #UFCVegas104 pic.twitter.com/cBtPdhvHRV

— ESPN MMA (@espnmma) March 15, 2025

Following his victory, Vallejos praised his fallen opponent for the opportunity to compete, then made it clear he’s coming to avenge the lone loss of his career against Jean Silva.

“Jean Silva, I’m coming for you,” Vallejos told Michael Bisping through an interpreter in his post-fight interview. “Let’s go.”

Up-to-the-minute UFC Fight Night 254 results include:

• Kevin Vallejos def. SeungWoo Choi via TKO (punches) – Round 1, 3:09
• Waldo Cortes-Acosta def. Ryan Spann via TKO (strikes) – Round 2, 4:48
• SuYoung You def. AJ Cunningham via unanimous decision (30-27, 30-27, 30-27)
• Carlos Vera def. Josias Musasa via submission (rear-naked choke) – Round 1, 3:16
• Sam Hughes def. Stephanie Luciano via split decision (29-28, 28-29, 29-27)
• Andre Lima def. Daniel Barez via submission (rear-naked choke) – Round 3, 3:05
• Priscila Cachoeira def. Josiane Nunes via knockout (punch) – Round 1, 2:46
• Carli Judice def. Yuneisy Duben via TKO (head kick, punches) – Round 1, 1:40

For more on the card, visit MMA Junkie’s event hub for UFC Fight Night 254.