On February 2, 2020, it was reported Thatcher signed a contract with WWE. On the April 15, 2020 edition of NXT, Thatcher was revealed as Matt Riddle's tag team partner for the night, replacing Pete Dunne because of Dunne being unable to leave England, and therefore defending the NXT Tag Team Championships against Roderick Strong and Bobby Fish of the Undisputed Era, in which they were successful. After the match, in a backstage interview, Thatcher told Riddle he would defend the titles with him until Dunne returned. However, on the May 13 edition of NXT, Thatcher and Riddle lost the titles to Imperium when Thatcher walked out on Riddle during the match, after being inadvertently knocked off the apron by Riddle delivering a monkey flip to Marcel Barthel, thus turning heel in the process. Thatcher would then face Riddle later on in the evening, with Riddle picking up the win. Following the match, Thatcher would attack Riddle and lock him in his Fujiwara armbar submission. The next week, Thatcher took on Riddle in a cage match, similar to that of a lions den match where the winner would have to either knock out or tap out their opponents. Early on in the match, Thatcher started bleeding from his mouth and ended up losing two of his teeth, due to a kick by Riddle. Thatcher ended up picking up the win by getting Riddle to pass out to a rear naked choke. On the June 17 episode of NXT, he debuted a new gimmick of a submission specialist who teaches new students his "Thatch-as-Thatch-Can" style of training. On the September 16 episode of NXT, Thatcher had his first singles championship match in WWE when he faced Damian Priest for the NXT North American Championship; he would go on to lose the match. Shortly afterwards, he began a feud with Tommaso Ciampa, which led to a match at NXT TakeOver: WarGames, where Ciampa won. On the January 20, 2021 episode of NXT, Thatcher fought Ciampa in the Fight Pit, where he came out victorious. After the match, Thatcher and Ciampa showed respect to one another and Ciampa asked Thatcher to be his partner for the Dusty Rhodes Tag Team Classic, which Thatcher accepted, turning face in the process. They defeated Ariya Daivari and Tony Nese in the first round and The Undisputed Era (Adam Cole and Roderick Strong) in the quarterfinals, before being defeated by the Grizzled Young Veterans in the semi-finals. On the June 15 episode of NXT, Ciampa and Thatcher defeated the Grizzled Young Veterans in a tornado tag match to earn a future NXT Tag Team Championship match. They faced the champions MSK on July 6 at The Great American Bash, but were defeated. Thatcher was injured on August 24, splitting up the team; he would be out of action for the remainder of the year. On January 5, 2022, Thatcher was released before ever returning to television.