Petr Yan holds the UFC bantamweight title after defeating Merab Dvalishvili by unanimous decision at UFC 323 in December 2025, establishing a 4-1 win streak with strong takedown defense and striking efficiency that traders view as durable through year-end 2026. Their imminent trilogy bout at UFC 333 on October 24 positions the Russian as the consensus favorite at 62% implied probability, reflecting his recent form, wrestling pedigree, and ability to neutralize Merab’s high-volume grappling attempts seen in prior meetings. Merab sits at 35% after a demanding 2025 schedule limited his preparation last time, though a full camp and hunger to reclaim the belt keep his upset potential viable in what remains a closely contested rivalry. Lower-probability names like Sean O’Malley, Song Yadong, and Umar Nurmagomedov trail due to positioning behind these two and limited immediate title paths, with recent roster changes like Farid Basharat’s release further concentrating the division’s top end.