Ulberg knocks out Prochazka in Round 1 to become new light heavyweight champion

Carlos Ulberg seized the UFC light heavyweight title with a stunning first-round knockout of Jiri Prochazka at UFC 327 on April 11, 2026, announcing himself as the new king of the 205-pound division.

Ulberg, known as "Black Jag," entered the fight ranked third in the division and delivered the most significant victory of his career. The 35-year-old New Zealander, who trains out of City Kickboxing, now carries a professional record of 15-1. The finish marked his sixth knockout inside the UFC and ninth of his career overall, capping a ten-fight winning streak within the promotion. Standing six-foot-four with a 77-inch reach, Ulberg has been one of the most prolific strikers in the division, averaging 6.54 significant strikes per minute at 55 percent accuracy.

Prochazka, the 33-year-old Czech contender from Jetsaam Gym Brno, suffered the third loss of his UFC career in a light heavyweight title fight, dropping his record in the promotion to 6-3 and his overall mark to 32-6-1. Standing six-foot-three with an imposing 80-inch reach, Prochazka has long been one of the most dangerous finishers in the division, averaging 5.69 significant strikes per minute at 55 percent accuracy. The defeat is a significant setback for a fighter who had established himself among the elite of the light heavyweight class.

Why it matters

• Ulberg's ten-fight UFC winning streak and now six promotional knockouts cement him as a legitimate long-term champion at 205 pounds.
• Prochazka's third title-fight loss raises questions about his path back to another championship opportunity.
• City Kickboxing adds another UFC title to its roster, reinforcing the New Zealand gym's status as one of the sport's premier training camps.
• The light heavyweight division's top two ranked fighters must now recalibrate their trajectories in pursuit of the new champion.