Who holds the record for the fastest knockout in UFC history?

Jorge Masvidal holds the record for the fastest knockout in UFC history. At UFC 239 on July 6, 2019, he stopped Ben Askren in just five seconds with a flying knee.

The bout began with Masvidal charging forward from his corner while Askren moved in for a takedown. Masvidal timed the entry perfectly, jumping into a knee that landed flush and knocked Askren unconscious immediately. The referee intervened after Masvidal added follow-up punches, officially recording the finish at 0:05 of round one.

The moment became one of the most instantly recognizable highlights in MMA history and helped transform Masvidal from a respected veteran into a major UFC star. It was also a striking contrast between the fighters’ styles: Askren was an elite wrestler, while Masvidal used anticipation, timing, and explosive striking. The record is sometimes confused with the fastest UFC finish overall, but Masvidal’s five-second result is also listed as the fastest KO/TKO.