Mackenzie Dern

Mackenzie Dern (born March 24, 1993) is a Brazilian and American professional mixed martial artist and Brazilian Jiu-Jitsu practitioner.

She is a former world No. 1 ranked IBJJF competitor, currently ranked 6th among the female divisions.

She is an ADCC and no gi BJJ (black belt) World Champion.

As of February 20, 2024, she is #8 in the UFC women's strawweight rankings.

Dern was born in Arizona, the daughter of Wellington "Megaton" Dias, a highly decorated grappling competitor.

As a child, she grew up travelling back and forth between Arizona and her father's native Brazil.

Dern is fluent in English and Portuguese.

She has stated that Portuguese has become her primary language, explaining that "my dad and stepmom are both Brazilian. My boyfriend speaks Portuguese. I'm speaking Portuguese more than English. I still have lots of interactions in English of course. But I think in Portuguese, anything to do with fight is all in Portuguese in my mind, I dream in Portuguese."

Dern began training by the age of three and practicing with her father and stepmother who is also a black belt, Luciana Tavares.

Mackenzie started competing at a young age, and began competing in the adult divisions at 14 years old.

She has won a world championship in every belt level as she progressed to black belt rank, which was awarded to her by her father in December 2012, three months prior to her 20th birthday.

She graduated from Ironwood High School in Glendale, Arizona.

Due to her six 1st place finishes at the Asian Open, Mackenzie is the only female Jiu-Jitsu competitor to have won Gold Medals, at Black Belt level, at each of the 5 principal/highest ranking IBJJF Gi Championships - the other events are the Worlds, the Euros, the Pan Ams and the Brazilian Nationals.

One of her biggest achievements in BJJ came when she managed to defeat Gabi Garcia despite a huge weight difference, becoming one of the few women to do so.

Dern was scheduled to make her mixed martial arts debut against Kenia Rosas at Legacy FC 58.

She won her debut by unanimous decision.

Dern was scheduled to fight Montana De La Rosa at Legacy FC 61.

The bout was initially scheduled to be contested at strawweight, but was later changed to catchweight, as Dern missed weight by 2.8 lbs.

She won the fight by a first round submission.

Dern was scheduled to fight Katherine Roy at LFA 6.

Dern came in overweight for the second time in a row, missing weight by four pounds, and had to forfeit 20% of her purse.

She won the fight by unanimous decision.

Dern moved up to flyweight for her fourth professional fight, being scheduled to fight Mandy Polk at LFA 24.

She beat Polk by a first-round rear-naked choke.

After going 4–0 in her first four professional fights, Dern signed with Invicta Fighting Championship in November 2017.

Dern made her Invicta debut on December 8, 2017, at Invicta FC 26: Maia vs. Niedzwiedz against Kaline Medeiros.

She won the fight via an armbar in round three.

Dern made her promotional debut against Ashley Yoder on March 3, 2018, at UFC 222.

She won the fight via split decision.

Dern faced Amanda Cooper on May 12, 2018 at UFC 224.

At the weigh-ins, Dern weighed in at 123 pounds, 7 pounds over the strawweight non-title fight upper limit of 116 pounds.

As a result, the bout proceeded at catchweight and Dern was fined 30% of her purse.

Dern won the fight via submission through a rear naked choke in the first round.

After a hiatus from maternity leave, Dern faced Amanda Ribas on October 12, 2019 at UFC on ESPN+ 19.

She lost the fight via unanimous decision.

Dern was expected to face Ariane Carnelossi on April 25, 2020 at UFC Fight Night 173.

Carnelossi was forced to withdraw from the bout due to travel restriction.

Dern was scheduled to face Hannah Cifers on April 25, 2020.

However, on April 9 the promotion announced that this event was postponed.

The pairing eventually took place on May 30, 2020 at UFC on ESPN: Woodley vs. Burns.