Carlos Ulberg knocks out Jiri Prochazka in first round at UFC 327

Carlos Ulberg delivered one of the most stunning performances of his career, stopping Jiri Prochazka by first-round knockout at UFC 327 on April 11, 2026, in a result that sent shockwaves through the light heavyweight division.

Ulberg, known as "Black Jag," entered the fight ranked third in the world at 185 pounds — light heavyweight — carrying a record of 15 wins and just one loss. The 35-year-old New Zealander, who trains out of the renowned City Kickboxing camp, stands six-foot-four with a 77-inch reach and has quietly built one of the most aggressive striking outputs in the division, landing 6.54 significant strikes per minute at 55 percent accuracy. According to post-fight reports, Ulberg drew Prochazka in before landing the decisive finishing blow, a calculated piece of work that belied the shock of the outcome.

Prochazka, the second-ranked light heavyweight in the world, entered as a genuinely dangerous opponent by any measure. The 33-year-old Czech Republic native out of Jetsaam Gym Brno carries a career record of 32-6-1 and is one of the division's most prolific strikers, averaging 5.69 significant strikes per minute with 55 percent accuracy. At six-foot-three with an extraordinary 80-inch reach, the orthodox fighter has long been regarded as one of the most difficult matchups in the 205-pound weight class.

Why it matters

• Ulberg's win over the No. 2 ranked contender dramatically strengthens his case for a title shot
• The result reshuffles the top of a light heavyweight division already in flux
• A striker stopping one of MMA's most feared offensive fighters in the first round raises serious questions about Prochazka's path back to championship contention