Who has the fastest knockout in UFC history?

The Ultimate Fighting Championship (UFC) has seen countless electrifying moments over the years, but few are as unforgettable as the fastest knockout in its history. On July 6, 2019, during UFC 239, Jorge Masvidal delivered a record-setting knockout against Ben Askren in just five seconds—a moment that instantly became legendary in mixed martial arts (MMA).

UFC: Masvidal vs. Askren

Jorge Masvidal, a seasoned veteran known for his striking and street-fighting background, faced off against Ben Askren, an elite wrestler and former ONE Championship and Bellator champion. Askren was undefeated heading into the fight, bringing a reputation for dominant grappling and an unorthodox fighting style.

However, Masvidal had a different plan. From the moment the fight started, he sprinted toward Askren and launched a perfectly timed flying knee. As Askren instinctively ducked for a takedown, the knee landed flush on his chin, rendering him unconscious instantly. The referee, Jason Herzog, stopped the fight at the five-second mark, officially making it the fastest knockout in UFC history.

The Aftermath

Masvidal’s knockout sent shockwaves through the MMA world. It wasn’t just the speed of the finish—it was the technique, precision, and brutal effectiveness of the strike. The knockout was replayed countless times, and Masvidal’s celebratory gestures, including mocking Askren’s stiffened body, became part of UFC lore.

SHOP: The Kickboxer Collection

Following this victory Masvidal skyrocketed in popularity, earning a “BMF” (Baddest Motherf*er) title fight against Nate Diaz later that year. Askren, who had just two more fights in the UFC, retired from MMA in 2019. The flying knee became one of the most famous highlights in combat sports history.

How It Compares to Other Fast Knockouts

Before Masvidal’s five-second finish, the record was held by Duane “Bang” Ludwig, who knocked out Jonathan Goulet in six seconds at UFC Fight Night 3 in 2006. While Ludwig’s finish was officially recorded at six seconds, many argue it was closer to four seconds, but UFC timing discrepancies kept it at six.

Masvidal’s record is unlikely to be broken anytime soon, as such a fast and spectacular knockout requires perfect timing, strategy, and execution.