Ketlen Vieira Bio
Ketlen Vieira da Silva (born 26 August 1991) is a Brazilian professional mixed martial artist who has competed in the women’s Bantamweight division of the Ultimate Fighting Championship (UFC). Known by the nickname “Fenômeno,” she is widely respected for her well-rounded skill set built on the foundation of Brazilian Jiu-Jitsu and Judo, where she holds black belts in both disciplines. She began her professional career in 2014 and has built a reputation as a durable, technical fighter capable of competing with the top names in her division.
Throughout her career, Vieira has faced a long list of established opponents, including former champions and title challengers, earning her a place among the notable Brazilian mixed martial artists of her era. She has trained out of Manaus, Amazonas, representing Team Feitosa and Nova União Manaus.
Early Life and Background
Ketlen Vieira da Silva was born on 26 August 1991 in Manaus, Amazonas, Brazil. She grew up in the Amazonian capital and was introduced to combat sports at a young age, beginning her training in Brazilian Jiu-Jitsu as a child. When she was twelve years old, she expanded her grappling base by starting Judo, a discipline that would later become a defining part of her fighting identity.
Her dedication to martial arts deepened over the years, and she eventually earned black belts in both Brazilian Jiu-Jitsu and Judo, an accomplishment that reflects the years of disciplined training she invested before turning professional. She is also a decorated wrestler with multiple prestigious titles, including a Brazilian national wrestling championship, adding another layer to her grappling-heavy style.
Before committing fully to fighting, Vieira studied law at the University Nilton Lins, but she ultimately chose to leave her studies in order to pursue a career in mixed martial arts. That decision set her on a path that would take her from regional Brazilian shows to the largest stage in the sport.
Path to MMA
Vieira began training in mixed martial arts under Marcinho Pontes, who was José Aldo’s early coach at the Nova União Manaus gym. Working in the same environment that produced one of the greatest featherweights in the history of the sport helped shape her technical development, especially her ground game and overall fight IQ.
She made her professional debut on 2 October 2014, at Circuito de Lutas: Fight Night 4 in São Paulo, where she faced Juliana Leite and won by knockout in the second round. The debut victory was the beginning of a rapid rise on the Brazilian regional circuit, as she won her next five fights across promotions such as Mr. Cage and Big Way Fight Night, capturing the Mr. Cage Bantamweight title along the way.
By the time she signed with the UFC, Vieira had built an undefeated record of 6–0 in just 17 months. That fast-paced climb convinced the promotion that she was ready for the world’s biggest stage, and her debut came on 1 October 2016, at UFC Fight Night 96 in Portland, Oregon.
Ketlen Vieira Career
Early Career (2014–2016)
During her early professional years, Vieira competed exclusively in Brazil, sharpening her skills against regional opposition while stacking wins across multiple promotions. Her knockout debut over Juliana Leite announced her arrival, and she quickly added five more victories, claiming the Mr. Cage Bantamweight title in the process.
Those results gave her the momentum and experience needed to make the jump to the UFC, where she would face a much deeper and more experienced pool of talent. The combination of her grappling pedigree and her finishing ability made her a highly regarded prospect upon signing.
UFC Breakthrough (2016–2019)
Vieira made her UFC debut against Kelly Faszholz at UFC Fight Night 96, edging out a split decision victory in a closely contested fight. She followed it up with a unanimous decision win over Ashlee Evans-Smith at UFC on Fox 24 in April 2017, showing steady improvement with each appearance.
Her first signature UFC moment came on 9 September 2017, at UFC 215, when she submitted Sara McMann with an arm-triangle choke in the second round, announcing herself as a serious threat in the women’s bantamweight division. She added another important win over Cat Zingano at UFC 222, taking a split decision in March 2018.
Top-Tier Tests and Setbacks (2019–2023)
Vieira’s rise continued to be tested by elite competition. In December 2019, she suffered her first UFC loss when she was knocked out by Irene Aldana in the first round at UFC 245. She rebounded in September 2020 with a unanimous decision win over Sijara Eubanks at UFC 253 after Marion Reneau withdrew from the originally scheduled bout.
In 2021, she dropped a unanimous decision to Yana Kunitskaya at UFC Fight Night 185 after missing weight by two pounds, but she closed out the year with a high-profile main-event win over former champion Miesha Tate at UFC Fight Night 198. Her 2022 clash with Holly Holm at UFC Fight Night 206 produced a controversial split decision victory, with 18 of 20 media outlets scoring the bout for Holm, while in January 2023 she lost a split decision to Raquel Pennington at UFC Fight Night 217.
Recent Years (2023–Present)
Vieira got back in the win column in July 2023, taking a unanimous decision over Pannie Kianzad at UFC Fight Night 224. An expected bout with Macy Chiasson at UFC Fight Night 234 in January 2024 was scrapped after she was pulled due to injury, but she returned in October 2024 to face two-time PFL champion Kayla Harrison at UFC 307, where she lost a unanimous decision.
In 2025, Vieira was once again booked against Macy Chiasson, first for February at UFC Fight Night 252, then for May 31, 2025, at UFC on ESPN 68, where the bout was shifted to featherweight on the day of weigh-ins due to weight management issues, and she earned a unanimous decision win. On 1 November 2025, she dropped a split decision to Norma Dumont at UFC Fight Night 263, and on 16 May 2026, she took a unanimous decision over Jacqueline Cavalcanti at UFC Fight Night 276. On 22 May 2026, it was reported that Vieira had been removed from the UFC roster despite her latest victory.
Style and Strengths
Vieira is best known for her elite grappling, built on black belts in Brazilian Jiu-Jitsu and Judo, as well as a strong wrestling base that includes a Brazilian national title. She is comfortable working from the clinch, using judo throws to dictate position, and she hunts for submissions and top control on the mat. Her composure, durability, and ability to grind out decisions have allowed her to remain competitive against a deep bantamweight field.
Notable Events and Milestones
Her submission of Sara McMann at UFC 215 stands as one of her defining moments, while her main-event win over Miesha Tate in November 2021 remains one of the biggest victories of her career. The split decision over former champion Holly Holm in 2022, although controversial, is also considered a milestone result that underscored her place in the division.
Ketlen Vieira Career Wins
Across her professional career, Ketlen Vieira da Silva has compiled 16 wins in 21 total mixed martial arts appearances, with victories spread across multiple weight classes and promotions. Her finishes have come by knockout, submission, and decision, reflecting a versatile and well-rounded skill set.
UFC and Major-Promotion Highlights
In the UFC, Vieira has recorded notable decision wins over Kelly Faszholz, Ashlee Evans-Smith, Cat Zingano, Sijara Eubanks, Miesha Tate, Holly Holm, Pannie Kianzad, Macy Chiasson, and Jacqueline Cavalcanti, along with a second-round submission of Sara McMann at UFC 215. Earlier in her career, she captured the Mr. Cage Bantamweight title during a six-fight unbeaten run in Brazil, a stretch that earned her a UFC contract.
Other Wins and Performances
Outside the UFC, her regional résumé includes the Mr. Cage Bantamweight title and several finishes that showcased her grappling and pace. These early accomplishments laid the foundation for her long UFC tenure.
Ketlen Vieira Family
Family Background and Personal Life
Limited public information is available about Ketlen Vieira da Silva’s immediate family, parents, or marital status. What is known is that she was raised in Manaus, Amazonas, where she also continues to live and train out of Team Feitosa and Nova União Manaus. Her roots in the Amazonian capital remain a central part of her identity as a fighter.
2025 Season Performance
The 2025 calendar year was a mixed but active one for Vieira. After the previously scheduled bout with Macy Chiasson at UFC Fight Night 234 in January 2024 had been scrapped, the pair were rebooked throughout 2025, ultimately meeting at UFC on ESPN 68 on 31 May 2025. The bout was moved to a featherweight catchweight on the day of the weigh-ins, with Vieira forfeiting 25% of her purse, and she walked away with a unanimous decision win.
Later in the year, she took on Norma Dumont at UFC Fight Night 263 on 1 November 2025, dropping a split decision in a closely contested fight that 6 of 7 media outlets scored in her favor. The pair of fights underlined both her durability and the razor-thin margins that have come to define her recent UFC run.
Outside of the cage, the bigger storyline was the May 2026 report that she had been removed from the UFC roster, even after picking up a win over Jacqueline Cavalcanti. That development placed her future plans, including any potential 2025 or 2026 comeback booking, in a state of uncertainty heading into the rest of the year.
