Jon Moxley made his debut for Northeast Wrestling (NEW) on June 14, defeating fellow AEW wrestler Darby Allin. The following night, he answered CazXL's open challenge, and would later defeat him in a match. Moxley would also make a surprise appearance at Future Stars of Wrestling (FSW)'s "Natural Born Killers" event on July 6, where he would wrestle Killer Kross to a no contest.
In July 2019, it was announced that Good would face Josh Barnett at Game Changer Wrestling (GCW)'s Bloodsport on September 14. On August 16, Moxley defeated Pentagón Jr. at NEW's "Prison Break" Following his departure from WWE, Good made an unannounced appearance at AEW's premiere event, AEW Double or Nothing, reverting back to his Jon Moxley moniker.
He also started working in NJPW shortly after his WWE exit and won the IWGP United States Championship in his NJPW debut, becoming the first and only wrestler to have held the WWE and IWGP United States championships. During a long interview with NJPW, Moxley discussed his in-ring style: “There wasn’t a single guy who wasn’t injured when I got down with them in that ring.
Perhaps it was Yano (Toru Yano), a guy who did not take much damage, but after fighting with me in the ring, everyone said, ‘were we fighting on a battlefield?’ It was a series of hard games that seemed like an illusion”.