10 Most Brutal Knockouts In UFC History

5. UFC 102: Nate Marquardt Vs. Demian Maia

If you've ever wanted to see the perfect example of a real-life one-punch fight, this is it.

UFC 102 saw Nate Marquardt knock Demian Maia out with one single punch.

From the moment the fight started to the moment the fight ended, the contest officially clocked in at a brief 21 seconds.

The event itself was headlined by the mega fight of Randy Couture vs. Antonio Rodrigo Nogueira, yet that 15-minute, three-round battle was eclipsed by the the single right-handed cannon landed by Marquardt in a finish that still stands as one of the most shocking, brutal knockouts in the history of UFC.

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