Erosa Knocks Out Lee at UFC Vegas 123

Julian Erosa recovered from an early knockdown to stop Jeongyeong Lee in his retirement fight at UFC Vegas 123.

Updated on Oct. 31, 2026 in Mixed Martial Arts

Expressive sports illustration of a fighter in a cage mid-swing against a chain-link fence, rendered in navy and red-orange brushwork. — Julian Erosa knocked out Jeongyeong Lee at UFC Vegas 123 on Saturday, rallying from an early first-round knockdown in his retirement fight. AI Illustration. Upload story photo >

Julian Erosa knocked out Jeongyeong Lee at UFC Vegas 123 on Saturday after surviving an early knockdown in the first round. The win came in what was Erosa's retirement fight.

Why it matters

The stoppage closes out a veteran's career with a finish after he was briefly hurt early in the bout. It also highlights how quickly a fight can turn at the UFC level.

Erosa landed a right hand that ended the fight after Lee had scored an early knockdown with a left hand. Erosa did not get a takedown during the first round, and the source does not give further strike totals.

The players

Julian Erosa

Julian Erosa is a veteran UFC mixed martial artist whose win over Lee was his retirement fight.

Jeongyeong Lee

Jeongyeong Lee is a UFC mixed martial artist who was knocked out by Erosa in this bout.

The details

Lee landed a left hand that knocked Erosa down early, but Erosa scrambled back to his feet and pressed Lee against the fence. Erosa then stood and traded strikes before landing the right hand that finished the fight.

Saturday: Erosa knocked out Lee at UFC Vegas 123.

Season Trajectory

UFC Vegas events serve as the regular Fight Night-style cards on the promotion's calendar, and this stoppage adds one more result to that ongoing series. The finish closes out a veteran's career on a card held in the Las Vegas-based event format.

The result removes Erosa from active competition after his retirement fight, leaving the bout as his final career outing. Fans tracking UFC Vegas results can note the stoppage as a first-round knockout finish.

The takeaway

Veteran fighters can still produce decisive finishes late in their careers, and a knockdown early in a bout does not decide the result. Readers following the sport can watch how fights shift after the first round.