At UFC 327, held on April 11, 2026, in Miami, Florida, Carlos Ulberg achieved a remarkable victory by knocking out Jiri Prochazka to claim the UFC light heavyweight championship. Ulberg suffered a serious knee injury during the first round but managed to land a powerful left hook that sent Prochazka to the canvas. The knockout happened at 3:45 of the first round, marking a significant moment in UFC history due to the circumstances surrounding Ulberg's injury. After the fight, Ulberg expressed his determination, stating, "I never ever counted myself out. I knew that all I needed was that one shot." Prochazka, reflecting on his performance, admitted he had let the fight slip away after recognizing Ulberg's injury, calling it a valuable lesson. Ulberg's victory not only crowned him champion but also showcased his resilience and fighting spirit, despite the likely torn ACL that could sideline him for a year.