Gunnar Eudy, the son of former WCW and WWE star Psycho Sid, wrote on his Facebook that his father passed away.

“I am deeply saddened to share that my father, Sid Eudy, has passed away after battling cancer for several years,” Gunnar wrote. “He was a man of strength, kindness, and love, and his presence will be greatly missed. We appreciate your thoughts and prayers as we grieve this loss. Details for a memorial service will be shared soon. Thank you for your support.”

The 63-year-old started his professional wrestling career in 1987 with Continental Championship Wrestling and two years later he found himself in WCW where he teamed up with Danny Spivey to form The Skyscrapers tag team. A year later, he was revealed as the newest member of The Four Horsemen where he remained a member until he left WCW for WWF.

In 1991, Sid made his WWF debut as Sid Justice and was the special guest referee for the SummerSlam main event between Hulk Hogan and Ultimate Warrior vs The Triangle of Terror. His work that night also involved saving Macho Man and Miss Elizabeth from an attack by Jake “The Snake” Roberts and The Undertaker.

Sid turned heel in early 1992 and started a feud with Hulk Hogan after he helped eliminate Hogan from the Royal Rumble, giving Ric Flair the win and the WWF title. Their feud culminated at WrestleMania in a match that saw the return of the Ultimate Warrior.

Sid left the WWF in April of that year and returned to WCW in 1993 but his stint there was short lived after he had an altercation backstage with Arn Anderson.

He returned to the WWF for two years between 1995 and 1997 where he became the WWF champion twice, losing the titles to Shawn Michaels at the 1997 Royal Rumble and a few months later again at WrestleMania 13 to The Undertaker.

He would leave the company in the Summer of 1997 and after runs on the independent circuit and ECW, he went back to WCW where he won the World Heavyweight title. He suffered a nasty leg injury in 2001, coming off the top rope and snapping his leg during a match at the Sin pay-per-view, effectively ending his in-ring career.

He last appeared on WWE television on the 1000th episode of Monday Night Raw.