On the June 22, 2021 episode of NXT, Roderick Strong formed the Diamond Mine stable along with Tyler Rust (who was released weeks after and later replaced by The Creed Brothers and Ivy Nile) with Hachiman as the stable's trainer and Malcolm Bivens as their manager. On the September 21 episode of NXT 2.0, Strong defeated Kushida to win the NXT Cruiserweight Championship. At NXT WarGames, Strong defeated Joe Gacy, retaining his championship. At NXT New Year's Evil, he lost the title to Carmelo Hayes, unifying both North American and Cruiserweight titles. Strong and the rest of Diamond Mine would slowly turn face at the start of 2022, when they entered a feud with Imperium. On February 15, at NXT Vengeance Day, The Creed Brothers defeated MSK to win the men's Dusty Rhodes Tag Team Classic. At Worlds Collide, Damon Kemp betrayed Diamond Mine by costing the Creed Brothers the NXT Tag Team Championships to Pretty Deadly in a fatal four-way elimination tag team title unification match, involving the NXT UK Tag Team Champions Josh Briggs and Brooks Jensen, and Gallus (Mark Coffey and Wolfgang), after hitting Julius Creed with a steel chair. In November 2022, Strong's WWE contract expired, ending his time in the company and group. On the March 14 episode of NXT, Tatum Paxley betrayed Ivy Nile, thus also effectively leaving Diamond Mine. On the July 4 episode of NXT, The Creed Brothers lost a "Loser Leaves NXT" match to the Dyad, seemingly ending the group.