On September 19, 2012, Grey made his NXT televised debut and lost two sparring matches to Kassius Ohno.
In early 2013, Grey began teaming with Adrian Neville, and the two entered the tournament to determine the inaugural NXT Tag Team Champions. They defeated 3MB (Heath Slater and Drew McIntyre) and Kassius Ohno and Leo Kruger en route to the final, where they defeated The Wyatt Family (Luke Harper and Erick Rowan) on the February 13 episode of NXT, originally taped on January 31. Grey then suffered a torn anterior cruciate ligament and was written off television in March 2013 after an attack by the Wyatt Family. Whilst Grey was injured, he was replaced as Tag Team Champion by Bo Dallas, with whom Neville lost the titles to the Wyatt Family.
After more than a year off television, Grey returned on the April 10, 2014 episode of NXT, and promptly lost his first match back against Camacho on the April 17 episode. On April 30, 2014, it was reported that Grey had been released by WWE. His final television appearance on NXT (taped before his release), was participating in a 20-man battle royal to determine the number one contender for the NXT Championship, only to be the first one eliminated by Brodus Clay.