On December 2, 2020, Nash Carter and Wes Lee signed contracts with WWE and were both assigned to the WWE Performance Center. On the January 13, 2021 episode of NXT, they debuted under the team name MSK. They defeated Jake Atlas and Isaiah "Swerve" Scott in the first round of the Dusty Rhodes Tag Team Classic tournament. The duo then defeated Drake Maverick and Killian Dain in the second round on the January 27 episode of NXT to advance to the semi-finals. On the February 10 episode, they defeated Legado del Fantasma in the semi-finals. On February 14, at NXT TakeOver: Vengeance Day, MSK defeated the Grizzled Young Veterans in the finals to become the 2021 Dusty Rhodes Tag Team Classic winners. At NXT TakeOver: Stand and Deliver, MSK defeated Grizzled Young Veterans and Legado del Fantasma in a triple threat tag team match to win the vacant NXT Tag Team Championship. MSK would have their first successful title defense against the team of Killian Dain and Drake Maverick on the April 13 episode of NXT. At NXT TakOver: In Your House, MSK would team with NXT North American Champion Bronson Reed to take on Legado del Fantasma in a winners take all match, where the team of MSK and Reed would be successful. At NXT The Great American Bash, MSK would defeat Tommaso Ciampa and Timothy Thatcher to retain their NXT Tag Team Titles. On the September 8 episode of NXT, MSK would defeat Oney Lorcan and Danny Burch to retain the NXT Tag Team Titles. On the October 5 episode of NXT 2.0, MSK would successfully defend their titles in a fatal four-way elimination match. At NXT Halloween Havoc on October 26, MSK would lose their titles to Imperium, ending their reign at 201 days. They would regain their title from Imperium several months later on April 2, 2022, at NXT Stand and Deliver in a triple threat match that also involved The Creed Brothers. However a few days later on April 6, Nash Carter would be released from his WWE contract and two days later, the NXT Tag Team Championship would be declared vacant.