Valentine was at one stage engaged to Madusa, and married Julie on February 14, 1999. He has a daughter from a previous marriage, Vanessa, who began training with the Hart Brothers in the late 1990s. He is a born again Christian, and occasionally speaks at high schools and colleges with Ted DiBiase.
He held multiple titles in both the NWA and the WWF, the two largest promotions of the 1980s and 1990s, and appeared on both the first and the twentieth WrestleManias.
Greg Valentine was known and respected for his stamina and consistently stiff wrestling style. He and "Nature Boy" Ric Flair perpetuated the tradition of wearing glamorous robes to the ring, much like previous generations of wrestlers such as "Nature Boy" Buddy Rogers and Gorgeous George had.
On March 13, 2004, Valentine was inducted into the WWE Hall of Fame by his former manager Jimmy Hart. The following night, at WrestleMania XX in Madison Square Garden, Valentine received loud applause when the class of 2004 were introduced. Shortly after being inducted into the WWE Hall of Fame, Valentine dedicated the plaque he received to his late father by saying: "This one's for you pop."
Initially reluctant to take his father's ring name, Wisniski wrestled as Baby Face Nelson before becoming Johnny Fargo, one half of The Fargo Brothers with Don Fargo between 1971 and 1974.
After travelling around Texas in his teens with his father during a summer vacation, John Wisniski, Jr. decided to drop out of college and become a wrestler. His father initially tried to deter him, but eventually acceded to his wishes and sent him to Canada in 1970 to train under the legendary Stu Hart in Calgary. Wisniski remained in Canada for a year, wrestling his debut match in July 1970 against Angelo "King Kong" Mosca (he lost in around five minutes). Six months later, Wisniski relocated to Detroit to complete his training under The Sheik.
He is the son of wrestling legend Johnny Valentine.