Undefeated 'Kill Bill' Steps In at UFC Mexico City

21-year-old Mexican prospect Regina Tarin makes Octagon debut on short notice.

Feb. 26, 2026 at 12:33am

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A 21-year-old prospect with a 7-0 record, Regina Tarin, will make her UFC debut on less than a week's notice at UFC Mexico City. Tarin, nicknamed 'Kill Bill,' will replace the injured Sofia Montenegro and face Ernesta Kareckaite in a 130-pound catchweight bout this Saturday at UFC Fight Night 268 in Mexico City.

Why it matters

Tarin is an undefeated prospect from Mexico City who has made a name for herself on the regional circuit, winning the Budo Sento bantamweight title in 2024 and securing three victories under the Combate Global banner. Her short-notice UFC debut is an opportunity to showcase her skills on the big stage.

The details

Tarin has finished all but one of her seven professional wins inside the distance, showcasing her finishing ability. UFC Fight Night 268 will take place at Arena CDMX in Mexico City, with the main card airing on Paramount+ starting at 8 p.m. ET/5 p.m. PT.

  • UFC Fight Night 268 will take place on Saturday, February 26, 2026.

The players

Regina Tarin

A 21-year-old Mexican prospect with a 7-0 professional record, nicknamed 'Kill Bill,' who will make her UFC debut on short notice at UFC Mexico City.

Ernesta Kareckaite

Tarin's opponent in a 130-pound catchweight bout at UFC Mexico City.

Sofia Montenegro

The original opponent for Kareckaite, who was forced to withdraw due to injury.

Brandon Moreno

The headliner of UFC Fight Night 268, facing Lone'er Kavanagh in a 125-pound bout.

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The takeaway

Tarin's short-notice UFC debut is a chance for the undefeated Mexican prospect to showcase her skills on the big stage and potentially earn a permanent spot on the UFC roster with an impressive performance.