UFC Fight Night: Rosas Jr. vs. Barcelos is an upcoming UFC event on September 26, 2026 in Las Vegas, NV, USA, headlined by Raul Rosas Jr vs Raoni Barcelos. Check the 13-fight card, win probabilities, broadcast options, and venue details below.

Raul Rosas Jr faces Raoni Barcelos over five bantamweight rounds at Meta Apex in Las Vegas on Saturday, 26 September 2026, with both looking to strengthen their case for top-10 opposition. Rosas sits 12th and Barcelos 13th in the UFC's media rankings. There is no championship at stake, but beating an established ranked opponent would give either man a persuasive argument for moving upwards.

Rosas, 21, is set to become the youngest fighter to headline a UFC event, while the 39-year-old Barcelos arrives on the same five-fight winning streak as his opponent. The age gap attracts attention; the Brazilian's recent opposition makes the matchup significant. Barcelos has beaten Payton Talbott, Cody Garbrandt, Ricky Simon and Montel Jackson during that run, so this is considerably more demanding than another prospect-versus-veteran showcase.

Rosas's strongest route to victory is sustained wrestling pressure, and his recent results show increasing patience with that approach. The 12-1 prospect has won three consecutive unanimous decisions: against Aoriqileng on 14 September 2024, Vince Morales on 29 March 2025 and Rob Font on 7 March 2026. Those victories followed his second-round submission of Ricky Turcios.

The Font performance produced 16 takedowns, demonstrating how persistently Rosas can reconnect when an opponent gets up. My reading is that persistence, rather than one spectacular shot, will be his most useful weapon against Barcelos. He needs to turn those repeated entries into damaging top work or submission threats, not spend five rounds exhausting himself in exchanges that keep returning to the feet.

Barcelos brings a 22-5 record and grappling credentials that make him a different assignment from Font. His last three fights were unanimous-decision wins over Garbrandt on 14 June 2025 and Simon on 8 November 2025, followed by a split decision over Jackson on 25 April 2026. A five-time Brazilian national wrestling champion and Brazilian jiu-jitsu black belt, he should recognise the positions Rosas usually exploits.

I see the decisive battle happening between Rosas's first failed takedown and his next attempt. Barcelos needs to separate, land short combinations and make the younger man restart from distance; Rosas needs to keep his hands connected and force those exchanges towards the fence. The extra two rounds create uncertainty for both: repeated failed shots could drain Rosas, while prolonged defensive wrestling could erode Barcelos's sharper striking opportunities.

Rodolfo Vieira vs Robert Bryczek is a middleweight co-main in which securing top position matters more than possessing impressive grappling credentials. Vieira is 11-5 with nine submission victories, but he lost a unanimous decision to Eric McConico on 25 April 2026 after suffering a third-round knockout against Bo Nickal on 15 November 2025. His preceding appearance was a unanimous-decision win over Tresean Gore on 2 August 2025.

Bryczek's boxing gives him the more obvious standing threat, although his own recent form is uneven. The 18-7 Pole lost a unanimous decision to Cam Rowston on 2 May 2026; before that, he stopped Brad Tavares in the third round on 6 September 2025 and lost a unanimous decision to Ihor Potieria on 10 February 2024. Twelve knockout victories explain his preference for striking, but he also holds a Brazilian jiu-jitsu black belt and should not be treated as an opponent with no grappling knowledge.

Brady Hiestand against Rinya Nakamura is the prospect matchup worth making time for. Hiestand returns after more than two years away, with a knee injury interrupting a three-fight winning streak. Nakamura is also returning from a lengthy absence after stopping Nathan Fletcher in just 62 seconds in his last appearance. Their wrestling exchanges should reveal more about their progress than simply comparing the length of their layoffs.

Norma Dumont Viana vs Ailin Perez carries a particularly strong connection to the women's bantamweight title picture. Perez has won six straight, including a February 2026 victory over Macy Chiasson, while Dumont's own six-fight winning streak ended against Joselyne Edwards in April. In my view, beating Dumont would give Perez a more substantial claim to a championship opportunity than another victory over opposition outside that established contender group.

Rosas is a modest favourite at 59.7%, with Barcelos given a 40.3% chance in the win probabilities shown on this page. Those figures convert to approximately 1.68 and 2.48 in margin-free decimal odds. They are mathematical equivalents of the probabilities, not live bookmaker prices, and they describe a competitive main event rather than an expected procession.

The co-main looks closer to even in my assessment than Vieira's 58.8% probability suggests. Bryczek's 41.2% chance deserves consideration because his route involves maintaining striking distance, whereas Vieira must first establish a position from which his submission advantage becomes useful. That is a stylistic judgement, not proof that either side offers value at every available price.

Nakamura's 74.8% probability represents a much stronger lean than either headline favourite receives. I would be more cautious about that separation because both he and Hiestand are returning from substantial inactivity. The uncertainty concerns how each performs after the layoff, not whether the favourite possesses the tools to win.

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My main-event pick is Raul Rosas Jr by decision. I expect Barcelos to land the cleaner standing combinations, but narrowly favour Rosas to keep enough exchanges connected and produce meaningful offence after his takedowns. The prediction depends on Rosas maintaining his pressure without forcing submissions that surrender position. If Barcelos repeatedly separates and makes him shoot from open space, the Brazilian can overturn that read.

My co-main pick is Robert Bryczek by third-round TKO. I expect the early grappling exchanges to be his most dangerous period, with his chances improving if he can make Vieira work unsuccessfully for takedowns. My lean is towards Bryczek finding sustained boxing opportunities later rather than landing an immediate knockout. Vieira securing an early takedown into a dominant position is the clearest reason this prediction could fail.

The main card starts at 8pm ET on Saturday, 26 September 2026, which is 1am BST on Sunday, 27 September in the UK. The prelims begin three hours earlier, at 5pm ET and 10pm BST on Saturday, 26 September. These are card start times, not a confirmed walkout time for Rosas and Barcelos.

Paramount+ carries the entire event live in the United States, including the prelims. UK viewers can watch through TNT Sports, with streaming available through its HBO Max offering. The main event follows the other main-card bouts, so British viewers planning specifically around Rosas vs Barcelos should account for the Sunday-morning finish rather than treating 1am as the headline fight's start.

Looking for live or catch-up coverage of UFC Fight Night: Rosas Jr. vs. Barcelos 2026? Use the country breakdown below for TV and streaming options.

Event venue, local timezone, and map details for fight night.

When and where is UFC Fight Night: Rosas Jr vs Barcelos?

UFC Fight Night: Rosas Jr vs Barcelos takes place on Saturday, 26 September 2026 at Meta Apex in Las Vegas, Nevada. Raul Rosas Jr and Raoni Barcelos headline at bantamweight, with Rodolfo Vieira against Robert Bryczek serving as the middleweight co-main event.

What time does Rosas Jr vs Barcelos start in the UK?

The main card begins at 1am BST on Sunday, 27 September, with prelims starting at 10pm BST on Saturday, 26 September. Rosas Jr vs Barcelos takes place after the other main-card fights. No exact main-event walkout time is confirmed, so 1am should not be mistaken for their scheduled entrance.

How can I watch Rosas Jr vs Barcelos in the US and UK?

US viewers can stream the entire event live on Paramount+, while UK coverage is available through TNT Sports and its HBO Max streaming offering. The US prelims begin at 5pm ET on 26 September, followed by the main card at 8pm ET.

Is Rosas Jr vs Barcelos a title fight?

No, Rosas Jr vs Barcelos is a non-title bantamweight main event scheduled for five rounds. Both fighters are pursuing progress towards higher-ranked opposition rather than contesting a championship on 26 September. The co-main between Rodolfo Vieira and Robert Bryczek is scheduled for three rounds at middleweight.

Who is favoured to win Rosas Jr vs Barcelos?

Raul Rosas Jr is the favourite in this page's win probabilities, at 59.7% against Raoni Barcelos's 40.3%. That is a moderate advantage, not an overwhelming one. Our prediction is Rosas by decision, but Barcelos has a credible route if he breaks the wrestling exchanges and consistently lands the better strikes.