Ailin Perez Says She Will Call Off UFC Mexico City Bout if Macy Chiasson Misses Weight
ailin perez, the No. 7-ranked UFC women’s bantamweight, has issued a clear ultimatum in the lead-up to her scheduled fight with Macy Chiasson on Saturday, Feb. 28, 2026, at Arena CDMX in Mexico: if Chiasson fails to make weight, Perez will refuse to fight. The warning heightens attention on Thursday’s weigh-ins and shifts scrutiny onto Chiasson’s recent history with the scale.
Ailin Perez’s Ultimatum to Macy Chiasson
Perez made the stance public in an interview, saying she has invested three months of preparation to both make weight and compete and will not accept excuses. She said she has seen Chiasson at the UFC Performance Institute and described her as "very big, " adding that if Chiasson does not make the bantamweight limit the bout will be off. Perez also expressed disappointment in the matchup selection and mentioned she had preferred to fight Norma Dumont.
Macy Chiasson’s Weight History and Catchweights
Macy Chiasson carries a documented history of scale issues into the fight. The record shows Chiasson has officially missed weight twice in the UFC and required catchweight arrangements on two other occasions. Perez highlighted that Chiasson missed weight for her last fight and the one before that, noting Chiasson accepted a catchweight with Ketlen Vieira when it became clear she was not going to make the limit.
Fight Records, Recent Runs and Prelims Placement
The matchup pits Chiasson (10-5) against Pérez (12-2). Chiasson arrives on the back of back-to-back defeats — decisions to Yana Santos and Ketlen Vieira — marking the first time she has lost consecutive fights in the UFC. Perez comes in with five straight UFC wins, most recently grinding out Karol Rosa, overwhelming Darya Zheleznyakova and holding down Joselyne Edwards with persistent clinch pressure and top control. The bout is slated for the prelims of the UFC Mexico City card headlined by Brandon Moreno vs. Lone'er Kavanagh.
Style Contrast: Perez’s Wrestling vs. Chiasson’s Length
Analyses of the matchup emphasize a stylistic clash. Perez thrives on chaining takedowns from the clinch, using body-locks, inside trips and mat returns to control opponents and ride heavy top time. Chiasson, a 5-foot-11 bantamweight, brings length, a long jab, teep kicks and a physical clinch game that can create offensive variety; her ledger includes finishes of Mayra Bueno Silva and a submission of Pannie Kianzad. If Chiasson can keep the fight at mid-range and use her reach, she can blunt Perez’s entries; if Perez turns it into a grinding, crowded fight, the contest favors her pressure and cardio.
Consequences for Weigh-Ins and UFC Oversight
Perez’s refusal to accept a missed weight effectively forces a binary outcome at the scale: either Chiasson hits the limit or the fight is off. That stance places added responsibility on UFC officials to monitor the process closely. The presence of established odds providers also turned attention to the competitive outlook: betting lines for the event are listed with DraftKings, and fans are encouraged to watch live coverage options such as fuboTV’s free trial for prelim action.
What makes this notable is the combination of an explicit contractual ultimatum and Chiasson’s repeated weight problems; the threat of a cancellation is not just about fairness but could materially alter the event’s prelim lineup and fighters’ trajectories. If Perez’s insistence forces stricter enforcement at weigh-ins, it may change how late preparations are handled for this pairing and others on the card.
The preview assessments lean toward Perez given her recent five-fight surge and wrestling-heavy control, while Chiasson’s size and striking tools offer a clear counter if she can defend early takedowns and keep the fight at her preferred range. One preview framed the contest as a tricky call but noted momentum and stylistic edges favor Perez, though the final line of that piece is unclear in the provided context.
With less than a week before Feb. 28, weigh-ins and the fighters’ ability to hit the bantamweight mark will determine whether this matchup moves forward as planned or is canceled altogether.
