Doctor analyzes Carlos Ulberg's knee injury sustained against Prochazka

Sports doctor Brian Sutterer has offered a detailed medical breakdown of the knee injury Carlos Ulberg suffered during his light heavyweight bout against Jiri Prochazka at UFC 327 on April 11, 2026.

According to Sutterer's analysis, Ulberg sustained a torn anterior cruciate ligament during the fight. The doctor pointed to the visible forward shift of the shin as evidence of the ACL tear, and also noted pulsation in the calf muscle at the moment the tibia moved back into its normal position. Despite absorbing this severe injury early in the contest, the 35-year-old New Zealander fought through it and finished Prochazka by knockout. Sutterer's post included well-wishes for Ulberg's recovery.

Ulberg, who trains out of City Kickboxing and carries a record of 15-1-0, entered the fight ranked third in the light heavyweight division. Standing six-foot-four and listed at 193 cm with a 77-inch reach, he has built a reputation as a high-volume striker, landing 6.54 significant strikes per minute at 55 percent accuracy.

Prochazka, the Czech knockout artist ranked second at light heavyweight, came in at 32-6-1. The six-foot-three, 191 cm Orthodox fighter carries a 80-inch reach and averages 5.69 significant strikes per minute with 55 percent accuracy. His record places him among the most dangerous finishers in the division.

Why it matters

• Ulberg's ACL tear is a significant injury that is likely to sideline him for an extended recovery period
• The result moves Ulberg past the second-ranked Prochazka, with major divisional implications at 205 pounds
• City Kickboxing's rising contender was already on a strong run, and the knockout result cements his status near the top of the division