Petr Yan Stuns Petr No Mercy at UFC 323: Bantamweight Throne Reclaimed in Epic Rematch

Russian MMA fighter Petr Yan delivering a knee strike to Petr No Mercy during their bantamweight title rematch at UFC 323 in Las Vegas T-Mobile Arena on December 6, 2025

In a performance that remade the bantamweight division, Petr Yan stunned the world at UFC 323 on December 6, 2025, regaining his position at the top of the pound-for-pound list, defeating the incumbent Petr No Mercy in a shocking upset.

The event was held in Las Vegas at the T-Mobile Arena, where it was sold out, and millions of people bought it on pay-per-view, cementing the career of Yan as one of the most resilient fighters in MMA history.

Yan Road Back: Setback to Glory

Yan did not find an easy way to this victory. The Russian striker suffered injuries and made difficult choices after losing his title in controversial ways years ago, including a transfer into a new training camp in Thailand. Questions were floating at 32 that his prime was in doubt, but Yan answered them with a series of decisive successes heading into this rematch.

His iron and accurate striking wrestling was indiscernible, as he was the best in every aspect compared to No Mercy. The struggle was over in a fourth round through the vicious knee to the body, followed by the pounding of the ground, which cost the referee his services.

The Fallout: Pound-for-Pound Rankings Redone

This victory puts Yan back at the top of the elite in MMA. He was not even top five previously because of his inactivity, but now, he takes the first position in the end-of-year lists of many experts in the year 2025. The win also replaces some long-time contenders such as Islam Makhachev and Jon Jones, leading to some debates in forums and podcasts.

Such was the performance of Yan, which pointed out his progression: more agile footwork, increased grappling defence, and inexhaustible cardio, which rendered him invulnerable. Already, the fans are talking of possible super fights like a crossover against flyweight king Alexandre Pantoja.

Emotional Retirement: Henry Cejudo Retires

UFC 323 was not only about Yan winning, but it was the blind to the end of an era as Henry Cejudo retires. The two-division champion and Olympic gold medalist was given a heartfelt tribute video, and it reflected on his illustrious career.

Cejudo, 38, gave family and health as the motives behind the hanging of the gloves, leaving behind him a legacy of brazen calls and technical genius. His last walkout was accompanied by standing ovations, and this is a card that is emotional.

In the Future, the UFC Slate in 2026 is Hot

As 2025 comes to an end, Yan wins the match, which preconditions truly thrilling clashes in 2021. He invited Sean O’Malley to a trilogy fight, which was going to be a fireworks event at UFC 330.

The last ESPN-televised event this weekend is a match between Brandon Royval and Manel Kape, yet everybody is focused on the reign of Yan. Not only does this change the order, but it also replenishes the sport, attracting new audiences to the unexpected show in MMA.

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