In October 1992, Godwinn, along with his tag team partner Phineas Godwinn, began wrestling for World Championship Wrestling, with Henry adopting the ring name "Shanghai Pierce" and Phineas becoming "Tex Slazenger". They remained with the promotion until 1994, with Pierce forced to unmask on the January 29 edition of WCW Saturday Night after losing to Johnny B. Badd.
In mid-1994, he joined the World Wrestling Federation (WWF), where he was renamed Henry Orpheus Godwinn (the initials spelling "H.O.G.") and given the gimmick of an Arkansan pig farmer who carried a bucket of "slop" to the ring, which he would throw upon his opponents. Godwinn was originally a heel, and assisted the Million Dollar Corporation on several occasions. When the leader of the Corporation, Ted DiBiase, was asked on an episode of WWF Action Zone whether or not Godwinn was a member of the Corporation, DiBiase insulted Godwinn. This inspired him to turn face by "slopping" DiBiase, and led to a brief feud between Godwinn and Corporation member Sycho Sid.
Godwinn then engaged in a feud with the aristocratic Hunter Hearst Helmsley. The feud culminated in December 1995 in an "Arkansas Hog Pen match" that Helmsley won. After the match, Godwinn tossed Helmsley into the slop.
In 1996, Godwinn was reunited with Slazenger, who had been renamed Phineas I. Godwinn. The duo were portrayed as being cousins (later brothers) and were collectively known as "The Godwinns". The two were faces and were managed by Hillbilly Jim. They began to feud with the Bodydonnas, with Phineas having a crush on Sunny and signed her as their manager. They would beat the Bodydonnas for the WWF Tag Team Championships. Eventually Sunny turned on them costing them their titles. The Godwinns feuded with the now-heel Smoking Gunns, in losing efforts. In 1997, the Godwinns began a heel turn, dropping Hillbilly Jim as a manager and picking up Uncle Cletus. The Godwinns quickly won the tag titles a second time from The Headbangers and began a heated feud with the Legion of Doom, which saw the team attempt to break Road Warrior Hawk's neck. They eventually dropped the titles to LOD in a match on WWF Monday Night Raw that had LOD's career on the line. Soon after that match, they attacked and fired Cletus.
In April 1997, in a rematch between The Godwinns and the Legion of Doom, Henry cracked his C7 vertebra when he fell on his head after taking the Doomsday Device.
In 1998, Godwinn entered the Brawl for All, a shoot-fighting tournament held by the WWF. He lost in the first round to Bradshaw.
Later that year, the Godwinns dropped their pig farmer gimmicks, now going by their real names, Mark Canterbury and Dennis Knight, and wearing sharp suits under the name "Southern Justice", the bodyguards of Tennessee Lee. Six months later, Canterbury herniated his C7 vertebra and pinched a spinal nerve, necessitating spinal fusion surgery. This came as a result of him returning to the ring too early after his neck injury. He eventually left the WWF.
On November 22, 2020, Godwinn returned to WWE along with Phineas I. Godwinn as The Godwinns, to take part in The Undertaker's retirement ceremony at Survivor Series.