The only fighter to ever knock Dricus Du Plessis out in his MMA career is now a free agent, and a potential UFC move looms large. Alongside Usman Nurmagomedov, the fighter in question could be another ‘hot’ free agent the world’s biggest MMA promotion could possibly sign. That man is Roberto Soldic. The 31-year-old Croatian confirmed his free agency in a story he shared on Instagram, also thanking ONE Championship (where he last fought). Dricus Du Plessis-slayer Roberto Soldic Is A KO MachineRoberto Soldic is a KO machine.