Sean Sharaf walked into UFC 331 on September 19, 2026, as one of the biggest underdogs the promotion has ever booked. Twelve seconds later, he had knocked out Olympic gold medalist Gable Steveson with a single left hook. Weeks on, the former Marine is still being asked the same two questions: who is he, and what does he do next? This guide sticks to what named outlets and the UFC itself have reported, and says plainly where the record is thin.
Who Is Sean Sharaf?
Sean Sharaf is an American heavyweight who fights under the nickname "The Smoke." The UFC's athlete page lists him at 6 feet 2 inches and 240 pounds, with a professional record of 5 wins and 2 losses, all five wins by knockout. He is a former U.S. Marine and trains out of Freestyle MMA.
Before the Steveson fight, he did not have a UFC win, and he had almost no media requests in fight week, according to the UFC's own aftermath story. We could not find a standalone Wikipedia page for him.
Sean Sharaf's Age and Hometown
The UFC lists his age as 33, and MMA Sucka gives the same figure. His birth date has not been published.
Where he is from needs a small caveat. The UFC page lists Anaheim, California, as his place of birth, while its Q&A says he is from Santa Ana. The UFC's aftermath story adds that the Los Angeles fight was "nearly in his hometown." Treat Orange County as the safe answer.
Sean Sharaf's Marine Corps Service
According to Task & Purpose, Sharaf served six years in the Marine Corps. He joined in 2014 and trained at Camp Pendleton. He began as a supply administration and operations specialist and later served as a Marine Security Guard until leaving active duty.
The outlet does not give his rank or any deployments, so we are not guessing at either. The UFC's story says he enjoys representing the Marines and that veterans have contacted him on social media since the win.
How Sean Sharaf Got to the UFC
His timeline is longer than the 12 seconds suggests. The UFC page says he started training in 2018 and turned professional in 2021. He holds the FCOC and LXF heavyweight titles and has five first-round finishes.
The UFC story adds that when he left the Marines, he planned to become a personal trainer, because "UFC fighter" was not a plan people took seriously. He then spent eight years chasing the dream, put other parts of life on hold and, he said, has not celebrated his birthday in years.
His UFC debut came on October 12, 2024. He lost his first two fights in the promotion, to Junior Tafa and Steven Asplund, according to MMA Sucka. That is why a third straight loss would likely have cost him his place on the roster, as Heavy noted.
The David Goggins Moment in 2019
One detail gives the story a nice shape. MMA Sucka reports that in 2019, Sharaf was randomly picked to join a David Goggins Instagram Live and told him he would fight in the UFC. He was an unknown Marine veteran at the time. The article does not describe how Goggins responded, so we will not either.
Sean Sharaf vs Gable Steveson at UFC 331
The fight took place at Crypto.com Arena in Los Angeles. Steveson, a Tokyo Olympics freestyle wrestling gold medalist, entered undefeated at 4- 0. Heavy reports the odds as Sharaf at +1000 and Steveson at -2500, and calls the result the biggest upset in UFC history. The UFC itself calls it one of the biggest.
The finish was a left hook 12 seconds into the first round. Per the UFC, it was the third fastest knockout in heavyweight history, and it was Sharaf's first UFC win. It also ended Steveson's unbeaten record. MMA Sucka adds that Jon Jones was in Steveson's corner that night, while the UFC says Steveson handled fight week interviews confidently and Sharaf barely did any.
What Sean Sharaf Said After the Knockout
His words in the cage were short. He told Joe Rogan, "I told you the game plan was hit, don't get hit, leave with a bag full of cash," and added, "I believed in myself when nobody believed in me." At the press conference, he said, "I don't put anyone on a pedestal. He has two hands, two legs, and he bleeds red."
Task & Purpose also quotes him on the faith side of the win: "I kept believing in myself, you know." He said he had been doubting himself and "left it in God's hands. It paid off."
The Bonus and What It Means for Sean Sharaf
The UFC story reports he earned a $50,000 bonus tied to the Paramount+ series Mobland, and that UFC chief executive Dana White matched it, which pushed the total into six figures. Sharaf said he hopes the money can eventually help his mother retire.
The UFC does not say what he was paid to fight, and we have no reliable figure for his purse or his net worth. Any number on a biography site is a guess.
Is Sean Sharaf Thinking About Retiring?
Sort of, and that is part of why his name keeps trending. MMA Sucka reports that shortly after the fight he asked aloud, "Can I beat that?" and "What am I doing it for?" He also said people were calling the knockout a lucky punch, and that sometimes you have to "leave the table when you're up."
He has not announced a retirement. MMA Sucka says he is weighing whether Steveson was the biggest fight of his career or the end of it, and a Yardbarker report notes that observers doubt he will walk away given the money a win like this can bring. The UFC's story says he is less focused on his next fight than on time off in the mountains with his dog.
What's Next for Sean Sharaf
The UFC athlete page lists no upcoming bout, and none has been announced in the coverage we reviewed. Heavy expects him to face another middle-of-the-pack heavyweight next, though that is a prediction by the writer, not a booking.
Steveson, meanwhile, is 1 and 1 in the UFC and 4 and 1 overall, according to Heavy. That matters for Sharaf because a rematch is the obvious storyline, even if nothing suggests one is planned.
What Is Still Unknown About Sean Sharaf
Several details remain unreported. His exact birth date, his rank in the Marines, his purse for UFC 331, and his net worth are not public. We also have no confirmed date for his next fight, and he has not said whether he will take one. If any of that changes, we will update this article.