Bia Mesquita submits Maycee Chiasson in Round 1 to go 9-0

Bia Mesquita extended her perfect record at UFC 334 on Saturday, submitting Maycee Chiasson with a choke in the opening round. The bout lasted roughly a minute and a half, and Mesquita was the aggressor from the first seconds before locking in the finish late in the round. It was the first finish of the card.

The result moves the Brazilian to 9-0 in MMA and 4-0 inside the UFC. Mesquita, 35, competes at women's bantamweight, where she is ranked 11th. Standing five-foot-four with a 67-inch reach, she is an orthodox fighter who has built her UFC run on grappling pressure. Her career numbers show 3.57 takedowns per 15 minutes and 3.6 submission attempts per 15 minutes, alongside 4.52 significant strikes landed per minute at 57 percent accuracy.

Chiasson drops to 10-7 and has now lost four fights in a row, a skid that leaves her searching for a way back into the win column.

Why it matters

• Mesquita has now finished her last three recorded fights by submission, all of them in the first or second round, a run that includes Melissa Mullins in June 2026, Montse Rendon in March 2026 and Irina Alekseeva in October 2025.
• At 9-0 and ranked 11th, she keeps building a case in a bantamweight division where unbeaten records are hard to maintain.
• Her submission attempt rate of 3.6 per 15 minutes shows why opponents have struggled to survive once the fight hits the mat, and Saturday's quick finish fits that pattern.

The three submission wins in her recent recorded fights have come at a steady pace, roughly every three to five months, and the Chiasson win keeps that rhythm going. For Chiasson, the focus shifts to ending a four-fight slide that has pushed her record to 10-7.