In 1992, Mideon was hired by World Championship Wrestling, where he was renamed Tex Slazenger and given the character of an "ornery Texas outlaw". Slazenger formed a tag team with Shanghai Pierce. Slazenger and Pierce left WCW in 1994.
In 1996, Slazenger signed with the WWF and was therefore reunited with Pierce, and renamed Phineas I. Godwinn (abbreviated to P.I.G.). The duo were portrayed as being cousins and were collectively known as The Godwinns. Phineas made his in-ring debut on the January 29 episode of Monday Night Raw in a tag team victory for Godwinns over The Bodydonnas, and began a feud with Bodydonnas over their manager Sunny. They soon entered a tournament for the vacant WWF Tag Team Championship and defeated The New Rockers and Owen Hart and British Bulldog to qualify for the finals on the March 31 episode of Free for All, where they lost to Bodydonnas. They failed to win the titles from Bodydonnas in a rematch for the titles at In Your House 7: Good Friends, Better Enemies. On May 19, Godwinns defeated Bodydonnas to win the Tag Team Championship at a live event in Madison Square Garden. As a result, they gained Bodydonnas' valet Sunny as their manager on the May 26 episode of Free for All, where they lost their newly won titles to The Smoking Gunns.
In 1997, in a match between The Godwinns and the Legion of Doom, Henry Godwinn suffered a cracked vertebra when the Legion of Doom botched a Doomsday Device. In early 1998, the Godwinns dropped their pig farmer gimmicks and became "Southern Justice", the bodyguards of Tennessee Lee, using their real names of Dennis Knight and Mark Canterbury. Six months later, Canterbury herniated his vertebra and pinched a spinal nerve, necessitating spinal fusion surgery. He eventually left the WWF and retired, due to the neck injury suffered in 1997, leaving Knight without a partner.
In late 1998, Knight returned to the WWF after a brief hiatus, and in a short time, was kidnapped by the Acolytes and brainwashed into joining the Ministry of Darkness, a heel stable led by The Undertaker, who rechristened him as the deranged soothsayer "Midian" (spelling later changed to Mideon). Throughout 1999, The Ministry feuded with Stone Cold Steve Austin, with Mideon often teaming up with Viscera. Mideon "won" the European Championship during this time when he found it in Shane McMahon's bag. When The Undertaker was injured in late 1999, the Ministry disbanded, however, Mideon continued the gimmick and the unit with Viscera, including doing The Undertaker's biddings in matches well after The Ministry had dissolved, although no clear stable was ever established again.
In late 1999, Mideon appeared briefly as a Mankind imitator and teamed with Ivory in intergender matches on Heat.
Mideon returned in a limited capacity in 2000 as Naked Mideon, a persona who ran around arenas wearing only a fanny pack, a pair of boots and a thong. At No Mercy 2000, he tried to reclaim the European Championship from William Regal, but was defeated. At Armageddon 2000, Mideon briefly interfered in the match between Chris Jericho and Kane. Mideon then wrestled in a few dark matches under his previous moniker Tex Slazenger, but was released in January 2001.
From 2003 to 2004, Mideon returned for several dark matches for World Wrestling Entertainment under his own name.
On November 22, 2020, Mideon returned to WWE together with Henry O. Godwinn as The Godwinns, to take part in The Undertaker's retirement ceremony at Survivor Series.