5 secondsJorge Masvidal
Jorge Masvidal knocked out Ben Askren in just five seconds at UFC 239. This is the fastest knockout in UFC history. The fight ended before most fans could even blink.
It is absurd to achieve such a quick knockout in a professional fight.
Source: Wikipedia, Jorge Masvidal. Verified against Wikipedia, Jorge Masvidal and MMA Junkie (USA Today), Masvidal 5 second knockout on 2026-11-08.
Jorge Masvidal knocked out Ben Askren in just five seconds at UFC 239. This is the fastest knockout in UFC history. The fight ended before most fans could even blink. It is absurd to achieve such a quick knockout in a professional fight. Source: Wikipedia, Jorge Masvidal. Verified against Wikipedia, Jorge Masvidal and MMA Junkie (USA Today), Masvidal 5 second knockout on 2026-11-08.
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