In December 2006, Miller signed a developmental contract with WWE and was assigned to Deep South Wrestling (DSW), a WWE developmental territory. When the WWE ended its relationship with DSW in the spring of 2007, Miller was one of over twenty developmental wrestlers to be sent for further training at the new Florida Championship Wrestling (FCW) territory. At a June 2007 FCW show, Miller appeared as the manager of fellow developmental talent Shawn McGrath under the name Heath Wallace Miller Esq., but he reverted to using his real name and resumed his singles career while continuing to manage McGrath.