ONE Championship’s return to Denver, Colorado scheduled for August 1, 2025 (ONE 173) has been pushed back nearly a year following an injury to atomweight champ Stamp Fairtex.
Additionally, the Thai star, a multi-sport champion during her time with ONE Championship, has agreed to relinquish her ONE atomweight MMA world championship.
Promotion officials announced the news on Friday. ONE’s return to Denver, where they debuted on U.S. soil, will now take place on June 26, 2026 at the Ball Arena. A setback while rehabbing a knee injury was identified as the reason Stamp Fairtex was forced to withdraw.
Denice Zamboanga, the promotion’s interim atomweight champion, now finds herself promoted to undisputed status.
“We are saddened to hear of the injury setback to Stamp and wish her nothing but the best in her road to recovery,” ONE Chairman and CEO Chatri Sityodtong was quoted as saying as part of ONE’s announcement on Friday. “After looking at multiple alternate headlining options that unfortunately did not come together, we have made the difficult decision to move our Denver event to June 26.”
“When bringing the world’s largest martial arts organization to the U.S., we strive to deliver the very best product to our passionate American fan base and put on the most entertaining and memorable show possible. The U.S. remains a high-priority market for ONE and our global business, and we remain committed to maintaining a strong presence in the region with monthly ONE Fight Night events in U.S. primetime and future on-ground events.”
