Regina Tarin vs Ernesta Kareckaite Prediction: Catchweight Bout

The UFC’s return to Mexico City on February 28, 2026, has been plagued by last-minute changes, but the latest addition to the card brings a massive boost of local energy. Undefeated Mexican prospect Regina Tarin has officially stepped in on less than a week’s notice to face Lithuania’s Ernesta Kareckaite.

Following the withdrawal of Sofia Montenegro, the promotion moved quickly to sign Tarin, a 21-year-old finisher who has been a standout on the regional circuit.

Due to the extremely short turnaround, the bout will now take place at a 130-pound catchweight.

Regina “Kill Bill” Tarin: The Undefeated Homegrown Threat

Regina Tarin enters the Octagon with a perfect 7-0 professional record. Fighting out of the renowned Bonebreakers MMA gym, Tarin has earned her nickname “Kill Bill” through a relentless finishing rate.

According to her Tapology profile, Tarin has secured finishes in six of her seven victories.

Her most notable performance came in July 2025, when she dismantled veteran Kaytlin Neil via second-round TKO.

Interestingly, Tarin’s combat sports path recently took a brief detour. In January 2026, she attended a high-profile WWE tryout at the Performance Center, where she was the only Mexican national invited. While her athletic versatility is clear, her heart remains in the cage.

This short-notice opportunity is a full-circle moment; Tarin was originally slated for the Contender Series in 2025 before withdrawing, only to now debut on a much larger stage in her home country.

Ernesta Kareckaite: “Heavy Hands” Looking for Consistency

Standing in the way of a perfect Mexican debut is Ernesta Kareckaite. The 27-year-old Lithuanian (6-1-1) earned her spot in the UFC through a bloody, high-volume war on Dana White’s Contender Series in 2023, where she set records for strikes landed in a flyweight bout.

Kareckaite has had a mixed run in the big leagues so far:

• Loss: Unanimous decision to Dione Barbosa at UFC 301.
• Win: Split decision victory over Nicolle Caliari in January 2025.

Kareckaite is a former Hexagone MMA champion with a deep background in kickboxing and Kudo. Standing 5’9″, she typically holds a significant reach and height advantage over her opponents.

Her strategy often involves using long-range strikes to frustrate aggressive blitzers, a style that will be put to the test against the explosive Tarin.

Fight Breakdown: Youth vs. Experience

This matchup presents a classic clash of styles and career trajectories.

Feature	Regina Tarin	Ernesta Kareckaite
Record	7-0	6-1-1
Age	21	27
Nickname	Kill Bill	Heavy-Handed
Finish Rate	85%	33%
Stance	Orthodox	Orthodox

The Power Factor

Tarin is the more explosive athlete. She possesses legitimate one-punch power for the 125-pound division and a dangerous submission game if the fight hits the floor.

Her win over Yurivia Jimenez in late 2025 proved she can find the knockout early in the first round.

The Volume Factor

Kareckaite thrives in deep water. She isn’t necessarily a “one-shot” knockout artist despite her nickname, but she is a master of attrition.

If she can survive the initial storm from Tarin and utilize her 71-inch reach, she could pull away on the scorecards in the later rounds.

Why This Fight Matters for UFC Mexico City

With the main event also seeing Brandon Moreno take on a replacement in Lone’er Kavanagh, the addition of a high-ceiling local talent like Tarin is vital for the live gate.

For Kareckaite, a win over an undefeated prospect silences the skeptics who questioned her split-decision victories.

For Tarin, a win on Saturday night instantly makes her the most talked-about female prospect in Latin American MMA.

The altitude of Mexico City will undoubtedly play a role, especially given Tarin’s short-notice preparation and the move to a 130-pound catchweight.