Dustin Jacoby has just pulled off an absolute shocker of a result.

Jacoby needed just one punch to pull off a third-round knockout of Vitor Petrino during the main card of UFC Tampa.

The fight featured plenty of back and forth from both men. They looked to stay patient, but the Brazilian was arguably landing the more effective strikes.

But just when it looked like he would get his hand raised in a decision, "The Hanyak" changed things out of nowhere, landing a perfectly timed right hand to knock Petrino out cold.

Fans reacted to the brutal result, with many comparing the manner of it to Kamaru Usman's one-shot KO of Jorge Masvidal in 2021.

Shades of Usman Vs Masvidal https://t.co/z6baUQ2Xs3
— Hobby Go 2 (@Strange_MMA) December 15, 2024

Dustin Jacoby after 14 minutes of tit for tat, for no reason at all.

Highlight of his career over Vitor Petrino #UFCTampa pic.twitter.com/iCRD02f2kZ
— THE MMA GURU (@THATBOYMMAGURU) December 15, 2024

Bro on everything I just said "I don't even need to watch this, Petrino is winning" and then Jacoby killed him 1 second later 😭 #UFCTampa https://t.co/XpSyQQjJYv
— TheSportsAlien 💎 🇮🇪 (@Sports_Alien_OG) December 15, 2024

The #UFCTampa crowd when Jacoby just KNOCKED Petrino out Cold 😅😅 pic.twitter.com/kPKGMJuRBr
— RedWolf🐺 (@RedWolfMMA) December 15, 2024

Vitor Petrino is probably the biggest loser from tonight's card no matter what the result is from the remaining fights.

Dude is a 27 year old LHW prospect and he just got erased by a washed Dustin Jacoby, and submitted in his last fight against Anthony Smith. #UFCTampa https://t.co/qELdwSgWtz
— EK (@EdwardsKim) December 15, 2024

So I almost typed that Jacoby looked good in the first, mainly bc there was a thing you see in gyms or even with friends that don’t get it entirely. Petrino is very athletic, and he’s scary enough to make most men gun shy, but he was throwing punches with anger,which makes chin..
— Brendan Dorman (@BrendanDorman) December 15, 2024

That shot might have sent Vitor petrino to the regionals, Lost to Anthony Smith Prolonging his career, then he loses to A washed jacoby who lost 4 out of 5. He better hope he has another fight on his contract. #UFCTampa
— Mma Ricky (@MmaRicky) December 15, 2024

holy shit Dustin Jacoby out of nowhere late in Round 3. Petrino went out bad #UFCTampa
— Patrick Danna (@patdannamma) December 15, 2024

Dustin Jacoby literally twisted Vitor Petrino's legs under him.
What a KO!
— Raymond G. (@raymondgstanley) December 15, 2024

After going 6-0-1 to start his UFC career following an appearance on Dana White's Contender Series, Jacoby had lost four of five entering UFC Tampa and was likely fighting for his job.

Petrino, after an 11-0 start to his professional MMA career, has now lost back-to-back fights. He was finished by Anthony Smith earlier this year at UFC 301.

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