UFC 320: Macy Chiasson Misses Weight, Sparks Controversy

Macy Chiasson, a fighter on the UFC 320 card, has faced significant backlash after missing weight for her bantamweight bout against Yana Santos. The weigh-ins occurred on October 3, 2025, at the T-Mobile Arena in Las Vegas, where Chiasson weighed in at 137.5 pounds, exceeding the non-title limit of 136 pounds. In contrast, Santos successfully made weight at 135 pounds. As a consequence of her weight miss, Chiasson has been fined 25% of her fight purse.

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Yana Santos publicly criticized Chiasson on social media, stating, “Imagine signing a contract and showing up overweight AGAIN. Some of us respect the grind. Others disrespect the sport. See you Saturday.” This sentiment reflects a broader frustration within the MMA community regarding fighters who fail to meet weight requirements. Santos, who is married to former UFC fighter Thiago Santos, emphasized the importance of discipline and respect for the sport in her comments.

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This incident marks the second time Chiasson has missed weight in her UFC career, having previously failed to make weight for her fight against Raquel Pennington at UFC Vegas 45. The repeated weight misses have raised questions about her future in the bantamweight division. Critics, including fans and fellow fighters, have called for UFC President Dana White to consider cutting Chiasson from the promotion due to what they perceive as unprofessional behavior.

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Macy Chiasson, 34, hails from New Orleans and has a professional record of 10 wins and 4 losses. She has primarily fought in the featherweight division but is now competing in bantamweight. In her last fight, she lost to Ketlen Vieira by unanimous decision. Yana Santos, 35, from Murmansk, Russia, has a record of 16 wins and 8 losses and is coming off a unanimous decision victory over former champion Miesha Tate. Santos trains with American Top Team, which has contributed to her success in the bantamweight class.

UFC 320: Chiasson vs Santos - Date, Start time, Fight Card, Location

While Chiasson has not publicly addressed the weight miss, the UFC community's reaction has been overwhelmingly critical. Fans have expressed their disappointment on social media, with some labeling her actions as “unprofessional” and suggesting that she should be removed from the UFC roster.

‘Unprofessional’ – Dana White told to cut UFC 320 fighter who misses weight and gets huge fine

Despite the weight controversy, the fight between Chiasson and Santos will proceed as scheduled on October 4, 2025, as part of the UFC 320 event, which is headlined by a light heavyweight title clash between Magomed Ankalaev and Alex Pereira. The bout is set to be a three-round contest with no titles on the line, but it carries significant implications for both fighters' careers.

UFC 320: Chiasson vs Santos - Date, Start time, Fight Card, Location

• “Imagine signing a contract and showing up overweight AGAIN. Some of us respect the grind. Others disrespect the sport. See you Saturday.” — Yana Santos, Fighter

UFC 320 fighter scolds opponent for missing weight and ‘disrespecting the sport’

This situation highlights the ongoing challenges fighters face in managing weight and the repercussions that can arise from failing to meet contractual obligations.

UFC 320 fighter with previous scale fail misses weight a second time — ‘Disrespecting the sport’