Will Melquizael Costa win by KO or TKO?

This market will resolve to "Yes" if Melquizael Costa defeats Arnold Allen at UFC Fight Night: Allen vs. Costa, scheduled for May 16, 2026, by KO or TKO, including referee stoppage, doctor stoppage, or corner stoppage. Otherwise, it will resolve to "No." If the fight ends in a draw or by disqualification (either fighter), it will resolve "No." If the bout is ruled a No Contest, not scored, canceled, or postponed beyond May 30, 2026, this market will resolve "50-50." The resolution source for this market will be official information from the UFC.