UFC 320 in Las Vegas is jam-packed with high-stakes fights and title dreams, but a single moment from the audience stole the show instead. During Joe Pyfer‘s victory over Abus Magomedov, cameras caught a man celebrating while holding a newborn wrapped in a blanket and wearing earmuffs. The adorable scene instantly went viral, stealing attention even from celebs like Holly Madison and Mark Zuckerberg.

Social media immediately erupted with reactions highlighting the sheer surprise and amusement at the moment. Fans soon christened the child “USA Baby” as screams of pride and amusement filled the comment sections: “USA baby,” wrote a user, while others were simply in disbelief. They wrote, “Wtff, that man got a whole a– child in there 😭,” “Wait a minute, who tf is taking their child to an event LMAO,” and “Dude, is that a newborn?!? 😭.”

According to one fan, this was the ultimate father-son moment, as the man tried to expose his son to the thrills of MMA from a very early age: “Start teaching them young!” For many, the sight of a tiny fan unknowingly cheering alongside the crowd perfectly captured the over-the-top energy of UFC events.

However, not everyone was cheering at the sight, as they raised concerns about safety and judgment. Comments poured in with some harsh criticisms, as several wrote tweets such as “Ngl this is sad 💀. Don’t bring a baby to a UFC event; too many drunk a——-,” “Bringing a baby is just dumb,” and “Wait until his wife sees and thinks he’s at home with the kid.”

Another user added, “Letting a baby into the arena is wild.” The moment surely triggered a heated debate over where the line should be drawn between fan enthusiasm and responsibility. Meanwhile, Joe Pyfer’s performance inside the Octagon at UFC 320 proved why he continues to advance through the middleweight ranks.

Several reactions on X praised his domination and resilience: “Crazy turnaround there by Pyfer,” “That was a nasty rear-naked choke,” and “Pyfer was a different breed tonight!” Even amidst the controversy in the stands, the knockout artist’s second-round submission victory solidified his status as a fan favorite, especially after that insane comeback. But in the end, all the talk went towards the USA baby, and the remaining headlines were grabbed by Mark Zuckerberg, who pulled off a Theo Von tonight at UFC 320.

Mark Zuckerberg tries to achieve Theo Von’s feat at UFC 320

Mark Zuckerberg’s early presence at UFC 320 during the prelims shifted the early focus away from the fights and toward the tech tycoon. Fans were surprised to see him in the front row for the opening bouts, as he was better known for boardroom appearances than cageside seats.

Social media buzzed as he secretly attempted to emulate Theo Von‘s achievement at UFC events: arriving early and witnessing every fight from beginning to end. While most A-listers arrive just in time for the main card, Zuckerberg arrived much earlier than Dana White and the majority of the audience, taking in the atmosphere and watching the lesser-known fighters perform.

His presence generated comparisons online, with fans noting how the comedian-turned-fan favorite Von had set the standard for this level of dedication months before. By appearing for the prelims and witnessing every fight, Zuckerberg emulated Von’s attitude of being totally present in the cage, gaining praise from fans who appreciate someone watching the event unfold rather than just posing for selfies.

It remains to be seen whether he will continue this tendency in future cards, but at UFC 320, the Meta CEO achieved a Theo Von-level moment. What do you think? Who was the star of UFC 320? Mark Zuckerberg or USA baby? Let us know in the comments.