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

Carlos Ulberg delivered one of the biggest upsets in recent light heavyweight history, stopping Jiri Prochazka by first-round knockout at UFC 327 on April 11, 2026.

Ulberg, known as "Black Jag," entered the fight ranked third in the light heavyweight division with a record of 15 wins and one loss. The 35-year-old New Zealander, who trains out of the renowned City Kickboxing gym, stands six-foot-four and carries a 77-inch reach. His striking output has been a defining feature of his UFC run, averaging 6.54 significant strikes landed per minute at 55 percent accuracy — numbers that reflect both his volume and efficiency on the feet.

Prochazka came in ranked second in the division, bringing a record of 32-6-1 and the credibility of a former light heavyweight champion. The 33-year-old Czech fighter, who stands six-foot-three with an enormous 80-inch reach, is one of the most dangerous strikers in the sport, averaging 5.69 significant strikes per minute at 55 percent accuracy. A finish this early against a fighter of his caliber underlines just how clean Ulberg's finishing power proved to be on the night.

Why it matters

• Ulberg's victory over a former champion and the division's second-ranked contender immediately forces a title conversation around the New Zealander.
• Prochazka drops his second loss in recent fights, complicating his own path back to the championship.
• The result reshuffles the top of a light heavyweight division already in flux, with rankings implications that will ripple through upcoming matchmaking.
• The style matchup featured two high-output orthodox strikers, and Ulberg's ability to end it early demonstrates his power edge even at the elite level.