Joshua Van won the flyweight title after Alexandre Pantoja suffered an arm injury in the opening seconds of the UFC 323 co-main event Saturday night at T-Mobile Arena in Las Vegas.
Van officially won via TKO at the 0:26 mark of the first round.
Alexandre Pantoja is taken backstage after losing his title at #UFC323 due to injury pic.twitter.com/cAZ745Ban8
— MMA Junkie (@MMAJunkie) December 7, 2025
Van, 24, is the first UFC champion born in the 2000s and the second-youngest champion in promotion history behind Jon Jones.
The victory is the fastest finish in a flyweight title fight, topping Henry Cejudo's 32-second knockout of TJ Dillashaw in 2019.
Van is one of the breakthrough stars of the year, winning four fights in a row to go from up-and-coming prospect to flyweight champion. The Myanmar native earned a shot at the title with a unanimous decision win over Brandon Royval in a Fight of the Year candidate at UFC 317 in June.
Pantoja's eight-fight winning streak - and 29-month title reign - came to an end in his fifth defense. The 35-year-old Brazilian suffered his first loss since 2020.
