Darby Allin reclaimed the AEW TNT Championship on August 30, 2026, at the All In event, defeating Kevin Knight in a brutal falls count anywhere match. The bout, originally intended as a singles contest, escalated quickly with Knight initiating the offense. The involvement of The Don Callis Family members Brian Cage and Jake Doyle, who supported Knight by attacking Allin, led to the intervention of Steve Borden, who entered the ring to aid Allin.
Amidst the chaos, the arena lights dimmed, and "The Icon" Sting made a surprise appearance. Sting, armed with his signature bat, confronted Cage and Doyle. Borden, Sting's son, then climbed a ladder and delivered a blow to the intruders. As the confrontation moved up the entrance ramp, Allin pursued Knight.
At the top of the ramp, Allin body-slammed Knight before scaling a nearby pillar. He then executed a Coffin Drop, falling backward and crashing through a section of the stage with Knight. Following the impact, as medical personnel attended to Knight, Allin leaped from the stage onto his opponent. Allin then pinned Knight to secure the victory and his third reign as TNT Champion. His previous reigns include holding the title from January 4, 2023, to February 1, 2023.