UFC settles back into the Meta Apex in Las Vegas on Saturday, Sept. 26, for a card built around a bantamweight main event that pits the youngest fighter ever to sign a UFC contract against a 39-year-old who refuses to slow down.
Raul Rosas Jr. was 17 when he earned his deal off Dana White's Contender Series in 2022. Raoni Barcelos had already been in the promotion for four years at that point. Now they meet with a five-fight winning streak apiece, a spot inside the bantamweight top 15 on the line, and, for the first time in either man's UFC career, the main event slot and a possible five rounds.
Below it sit the two finals from The Ultimate Fighter 34, a long-delayed bout for Road to UFC winner Rinya Nakamura, and a lightweight slugfest that could steal the show.
Main Event: Raul Rosas Jr. vs. Raoni Barcelos
Rosas Jr., 12-1 overall and 6-1 in the UFC, turns 22 next month and has spent his entire adult life inside the Octagon. His only loss, a decision to Christian Rodriguez in 2023, exposed a striking game that was nowhere near his grappling, and he has spent five straight wins closing that gap without abandoning what works. The last three of those wins came by decision, including a dominant showing against Rob Font at UFC 326 that featured 16 takedowns. The pattern is consistent: he presses forward, ties opponents up against the fence, and drags the fight to the mat, where his Brazilian jiu-jitsu black belt does the rest.
Barcelos, 22-5 overall and 11-4 in the UFC, is a different kind of problem than anything Rosas Jr. has faced. The Brazilian is also a jiu-jitsu black belt, has been in the promotion since 2018, and is on his second five-fight winning streak with the organization, a run that includes wins over Cristian Quiñonez, Payton Talbott, former champion Cody Garbrandt, Ricky Simon and, most recently, a split decision over Montel Jackson in April. His last four wins have all gone the distance, and he has never been submitted in a 27-fight career.
At 39, he has 18 years on his opponent, and the age gap is the main reason the market leans against him. The counterargument is that Rosas Jr. has never faced a grappler who can neutralize his entries, and Barcelos has the footwork and the power to make him pay for predictable shots.
Co-Main Event: Rodolfo Vieira vs. Robert Bryczek
The middleweight co-main event brings together two men trying to break losing streaks. Vieira, 11-5 overall and 6-5 in the UFC, is a multiple-time jiu-jitsu world champion who has dropped three of his last four and is working off back-to-back losses for the first time in his career. When his game clicks, it produces chokes and bonuses, as three of his last four wins came by submission, but at 36 the durability questions are real.
Bryczek, 18-7 overall and 1-2 in the UFC, arrived from Oktagon MMA in 2024 on a five-fight run of first-round knockouts and has found the promotion far tougher going. His one win, a third-round knockout of Brad Tavares in Paris last year, showed exactly what he can do when he lands clean. The decision loss to Cam Rowston in May showed what happens when he cannot.
Brady Hiestand vs. Rinya Nakamura
Two and a half years after it was first booked, this bantamweight bout finally happens. Nakamura, the Road to UFC Season 1 bantamweight winner, was scheduled to face Hiestand at UFC 298 in February 2024 before the American withdrew with an injury. Nakamura's wrestling pedigree makes him one of the more difficult stylistic matchups at 135 pounds.
The Ultimate Fighter 34 Finals
Both TUF finals land on the main card. In the women's strawweight final, Brazil's Valesca Machado is the favorite, with Melissa Amaya the underdog. In the bantamweight final, Mehemmedeli Osmanli is a heavy favorite, where Ilimbek Akylbek Uulu is priced as the underdog. Contracts are on the line in both fights, which tends to produce cautious, grinding performances from the favorites.
Josiah Harrell vs. Elves Brener
The main card opener is the most likely fight of the night to end early. Harrell, an Ohio lightweight, has finished 10 of his 11 professional wins and took his UFC debut on short notice up at welterweight against Jacobe Smith, where he was stopped in the first round. Back at his natural weight, he is a flat-footed, forward-pressing power puncher who invites exchanges.
Brener, a Brazilian at 3-3 in the UFC, won his first three fights in the promotion and then lost three straight against a run of ranked-level lightweights. His speed and the experience gained against that level of opposition make him a live underdog against a fighter with holes in his defense.
