On May 1, Good—having reverted to his former Jon Moxley gimmick and name—posted a video on his Twitter account to promote the gimmick's return, which showed him breaking out of a prison. On May 25, he made his unannounced debut for All Elite Wrestling (AEW) during Double or Nothing, the company's inaugural event, attacking Chris Jericho, Kenny Omega, and the referee after Jericho and Omega's main event match, thus establishing himself as an antihero character. Shortly after, it was announced that Moxley had signed a multi-year contract. Moxley had his AEW debut match at the Fyter Fest event in June, where he defeated Joey Janela in an unsanctioned match. After the match, Moxley was attacked by Omega in retaliation for his previous assault. A match between the two was scheduled for All Out on August 31. However, a week before the event, Moxley was forced to pull out after being diagnosed with a MRSA staph infection in his elbow, and would undergo surgery to remove it. AEW subsequently revealed Pac as Moxley's replacement, and the match was rescheduled for the Full Gear event. Moxley made his return on October 2, during the premiere episode of "Dynamite", taking out Omega during the latter's main event match. In the main event of Full Gear on November 9, Moxley defeated Omega in an unsanctioned Lights Out match.