For a heavyweight fight expected to reveal more about Gable Steveson’s rapidly developing MMA career, the story barely had time to begin. The atmosphere inside Crypto.com Arena in Los Angeles had hardly settled before the contest took a dramatic turn.

Sean Sharaf arrived at UFC 331 still searching for his first UFC victory. Steveson, meanwhile, brought an unbeaten professional MMA record and an extraordinary wrestling résumé into the Octagon. What happened next transformed the matchup into one of the most memorable moments of the September 19 event.

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UFC 331 began with Steveson looking to set the tone

The heavyweight bout was originally scheduled for the UFC 331 preliminaries, but its place on the card changed before fight night.

The planned Renato Moicano vs. Brian Ortega matchup was removed from the event because of an injury to Ortega. As a result, Steveson vs. Sharaf was moved onto the main card, placing the heavyweight contest in front of a larger audience at Crypto.com Arena.

That stage carried plenty of attention because of Steveson’s unusual path into professional MMA.

The 26-year-old had already built one of the most decorated amateur wrestling careers in the United States. He won gold in freestyle wrestling at the 2020 Tokyo Olympics, captured back-to-back NCAA Division I national championships in 2021 and 2022, and won four Big Ten championships during his collegiate career.

His move into MMA naturally created major expectations.

Steveson had entered UFC 331 with a professional MMA record of 4-0. His first four professional victories had all ended inside the opening round, including his UFC debut at UFC 329 in July, where he defeated Elisha Ellison by first-round knockout.

But there was still a lot for him to learn.

Steveson knew his MMA game was still developing

Before meeting Sharaf, Steveson openly discussed the adjustments he wanted to make after his first UFC appearance.

In a UFC interview, he said:

“I think the fight went great for a first time on the big stage,” Steveson said in a UFC interview before facing Sharaf. “Were there a lot of things that can be corrected? Of course, and I’m always gonna soak up everything like a sponge and try to be the best athlete that I possibly can…”

He also explained what he believed he needed to take away from his first UFC experience:

“My main takeaways are to just stay more active, know when to get out, know when to stay in; approach the fire with caution and just try not to get hit with anything sloppy or cheap and keep moving the way I have been…”

Those words would take on an entirely different meaning once the fight actually started.

There was no extended opportunity to test those adjustments against Sharaf.

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Sean Sharaf had one chance — and he took it

The fight moved at a pace that made a normal heavyweight game plan almost irrelevant.

Steveson opened the contest by throwing a leg kick. Sharaf quickly found his opportunity as Steveson dealt with the incoming punches.

Then came the decisive moment.

Sharaf connected with a left hand, ending the fight almost immediately.

The official result was:

Official Detail	UFC 331 Information
Event	UFC 331
Date	September 19, 2026
Location	Crypto.com Arena, Los Angeles
Fight	Sean Sharaf vs. Gable Steveson
Winner	Sean Sharaf
Method	KO
Round	Round 1
Official time	0:12
Sharaf before UFC 331	4-2 professional MMA record
Steveson before UFC 331	4-0 professional MMA record

The UFC’s official result lists Sean Sharaf def. Gable Steveson by KO at 0:12 of Round 1.

The promotion’s official coverage described the outcome as a monumental upset and confirmed that Sharaf landed the left hand immediately after absorbing Steveson’s low kick.

The UFC also released an official highlight titled “Sean Sharaf Knocks Steveson Out In 12 Seconds,” underlining just how little time the heavyweight matchup needed to reach its conclusion.

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The 12-second knockout changed Sharaf’s UFC story

For Sharaf, this was about much more than beating a highly accomplished wrestler.

He entered UFC 331 with a professional MMA record of 4-2, but he had not yet won inside the UFC.

His first two UFC appearances had ended in defeat. Before facing Steveson, Sharaf had suffered second-round knockout losses to Junior Tafa and Steven Asplund.

That meant the Steveson matchup represented a major opportunity for the 32-year-old Santa Ana native.

And he did not need a second round to take it.

The 12-second finish became Sharaf’s first UFC victory and put his name into the record books. According to the verified UFC information surrounding the event, the knockout became the third-fastest knockout in UFC heavyweight history.

That makes the result significant beyond the immediate upset.

Sharaf had gone from searching for his first Octagon win to producing one of the fastest heavyweight knockouts in UFC history in a single night.

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Sharaf’s reaction reflected what the win meant

The Santa Ana fighter also has a background in the United States Marine Corps.

After the result was made official, Sharaf spoke about the work and belief that had carried him through the difficult stretch leading into UFC 331.

“I feel amazing,” Sharaf said after the fight. “I worked so hard. I prayed so hard. I believed in myself when nobody believed in myself.”

The statement captured the significance of finally getting his first UFC win, particularly against an opponent whose wrestling credentials had generated major attention.

Sharaf had repeatedly expressed confidence throughout fight week and maintained that he could defeat Steveson.

Once the fight ended after only 12 seconds, that confidence had become part of one of the night’s defining storylines.

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Gable Steveson’s unbeaten MMA run suddenly came to an end

For Steveson, the result was a completely different chapter.

The defeat moved his professional MMA record to 4-1, giving him the first professional loss of his MMA career.

His previous four victories had all come inside the first round. That included his UFC debut against Elisha Ellison at UFC 329 in July, where Steveson secured another first-round knockout.

But against Sharaf, the fight ended before his wrestling could become a meaningful factor.

That is what made the result so striking.

Steveson had entered MMA with an elite wrestling background and was working to turn those skills into a more complete mixed martial arts game. His first UFC appearance demonstrated why his grappling pedigree had attracted so much interest.

Against Sharaf, however, there was no prolonged grappling exchange and no extended striking battle.

The contest ended before those strengths could properly enter the story.

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UFC 331 had several major results, but the heavyweight shock stood out

The Steveson-Sharaf fight was only one part of a busy UFC 331 card.

The event was headlined by a flyweight title rematch between Joshua Van and Alexandre Pantoja. Van retained his championship by unanimous decision.

The UFC’s official event results also recorded first-round stoppage victories for Arman Tsarukyan over Mauricio Ruffy and Patricio Pitbull over Dooho Choi.

Yet Sharaf’s victory became one of the night’s defining moments because of the speed and circumstances surrounding it.

The heavyweight contest had been placed on the main card after the Moicano-Ortega fight was removed because of Ortega’s injury. It then lasted only 12 seconds.

That sequence made the bout’s place on the card particularly notable.

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What the result means for Sharaf and Steveson

Sharaf leaves UFC 331 with something he had been waiting for: his first UFC victory.

He also leaves with a major result against one of the promotion’s most closely watched heavyweight prospects. His next opponent has not been announced, so his immediate path forward remains unknown.

For Steveson, the task now is to regroup after the first professional MMA defeat of his career.

His wrestling achievements remain part of the foundation that brought him into the UFC. The 26-year-old had only completed one UFC fight before facing Sharaf, meaning the loss comes at a very early stage of his MMA development.

It does, however, mark a significant setback after he began his professional MMA career 4-0 and entered the UFC with four first-round finishes.

The fight also provided a sharp reminder of how quickly a heavyweight contest can change.

Steveson had entered with Olympic gold, two NCAA Division I national championships, four Big Ten championships and an unbeaten professional MMA record. Sharaf entered still looking for his first UFC win after two Octagon defeats.

Twelve seconds later, the entire narrative had changed.

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Conclusion

Sean Sharaf needed only one clean opening to produce a result that instantly changed the course of his UFC career. After Steveson opened with a low kick, Sharaf landed the decisive left hand and stopped the Olympic wrestling gold medalist at 0:12 of Round 1.

The victory gave Sharaf his first UFC win, moved him beyond his difficult 0-2 start inside the promotion and placed the finish among the three fastest heavyweight knockouts in UFC history.

For Steveson, the result ended his unbeaten professional MMA run and moved his record to 4-1. His wrestling pedigree remains extraordinary, but his UFC 331 fight ended before he could showcase the wrestling and developing MMA skills that had made his transition so closely watched.

In the end, UFC 331 delivered a heavyweight twist nobody in the arena had much time to process: 12 seconds was all Sean Sharaf needed to stun Gable Steveson.

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Source and Research Disclaimer

This article has been prepared based on thorough research of the verified information and sources provided for the UFC 331 report, including UFC’s official event results, official scorecards, official video and coverage, UFC’s Gable Steveson pre-fight interview, CBS Sports, ESPN and MMA Fighting. The article reflects the information available following UFC 331 on September 19, 2026. Future opponents, rankings and career developments remain subject to official announcements. The article does not imply independent verification beyond the information supported by the provided sources.

Sources

• UFC – UFC 331 Official Results
• UFC – UFC 331 Official Scorecards
• UFC – Sean Sharaf knocks Steveson out in 12 seconds
• UFC – UFC 331 Bonus Coverage
• UFC – Gable Steveson pre-fight interview
• CBS Sports – UFC 331 results and Sharaf-Steveson report
• ESPN – Steveson knocked out by Sharaf in 12 seconds
• MMA Fighting – UFC 331 Sharaf vs. Steveson results

Featured Image Credit:

• Instagram @ufc / @sharafmma