On October 23, 2019, Atlas signed with WWE. On the April 1, 2020 episode of NXT, Atlas was defeated by Dexter Lumis in his debut. On April 12, Atlas was named a participant in the Interim NXT Cruiserweight Championship round-robin tournament. Atlas defeated Drake Maverick in his first match in the tournament and Tony Nese in his second match, but ultimately lost to Kushida. After Maverick defeated Kushida on the May 20 episode of NXT, a triple threat match was set up between Maverick, Kushida and Atlas for the following week as all three men were tied at 2-1. Maverick won the match after pinning Atlas albeit in a controversial fashion. On the June 19 episode of 205 Live, Atlas made his debut on the brand defeating Jack Gallagher. In October 2020, he would begin a feud with Santos Escobar over the Cruiserweight Championship, but every time he was defeated. In late 2020, he would start a feud with Isaiah "Swerve" Scott on NXT and feud with Ariya Daivari and Tony Nese on 205 Live. On August 6, 2021, Atlas was released from his WWE contract.