John Wisniski Jr.
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John Wisniski, Jr. is an American professional wrestler, better known as Greg "The Hammer" Valentine. He is the son of wrestler Johnny Valentine. In the course of his career, which has spanned over four decades, Valentine has held more than 40 championships, including the NWA United States Heavyweight Championship and the WWE Intercontinental Championship. An alumnus of WWE and World Championship Wrestling, he was inducted to the WWE Hall of Fame in 2004.
Known for
Credits
NWA The Final Conflict (1983)
as Greg Valentine
WWE WrestleMania III (1987)
as Greg "The Hammer" Valentine
WrestleMania (1985)
as Greg "The Hammer" Valentine
WWE SummerSlam 1991 (1991)
as Greg "The Hammer" Valentine
WWE WrestleMania VII (1991)
as Greg "The Hammer" Valentine
WrestleMania II (1986)
as Greg "The Hammer" Valentine
Chris Jericho's 30th Anniversary Celebration (2020)
as Greg "The Hammer" Valentine
WWE Survivor Series 1990 (1990)
as Greg "The Hammer" Valentine
WWE SummerSlam 1989 (1989)
as Greg Valentine
WWE Royal Rumble 1991 (1991)
as Greg "The Hammer" Valentine
Macho Madness (1988)
as Greg "The Hammer" Valentine
WWE Royal Rumble 1992 (1992)
as Greg "The Hammer" Valentine
WWE: The U.S. Championship: A Legacy of Greatness (2016)
as Greg 'The Hammer' Valentine (archive footage)
WWE Survivor Series 1988 (1988)
as Greg "The Hammer" Valentine
WWE SuperTape: Volume 5 (1992)
as Greg "The Hammer" Valentine
Headstrong (2019)
as Self
WWE: The History Of The Intercontinental Championship (2008)
as Himself
WWE WrestleMania IV (1988)
as Greg "The Hammer" Valentine
WWE Royal Rumble 1994 (1994)
as Greg "The Hammer" Valentine
The Greatest Wrestling Stars of the '80s (2005)
as Self
WWE: The History Of The WWE Championship (2006)
Actor
WWE Survivor Series 1987 (1987)
as Greg Valentine
Midnight Massacre (2025)
as Caepio
WWE WrestleFest '91 (1991)
as Greg "The Hammer" Valentine
Inside the Steel Cage (1986)
as Greg "The Hammer" Valentine
WWE Grudge Match (1986)
as Greg "The Hammer" Valentine
WWE: Starrcade - The Essential Collection (2012)
as Himself
WWE Hottest Matches (1990)
as Greg "The Hammer" Valentine
WCW WrestleWar 1992 (1992)
as Greg "The Hammer" Valentine
WWE Survivor Series 1989 (1989)
as Greg "The Hammer" Valentine
WWE Survivor Series 1993 (1993)
as The Blue Knight
WWE Royal Rumble 1989 (1989)
as Greg "The Hammer" Valentine
WWE: 150 Best Pay-Per-View Matches, Vol 1 (2014)
as Himself
WWE Royal Rumble 1990 (1990)
as Greg "The Hammer" Valentine
WWE WrestleMania V (1989)
as Greg "The Hammer" Valentine
WWE Funniest Moments (1991)
as Greg "The Hammer" Valentine
WWE The Big Event (1986)
as Greg "The Hammer" Valentine
WWE Wrestling at The Meadowlands: January '87 (1987)
as Greg "The Hammer" Valentine
WWE Rampage '91 (1991)
as Greg "The Hammer" Valentine
NWA Starrcade 1983 (1983)
as Greg "The Hammer" Valentine
WWE Mega Matches (1991)
as Greg "The Hammer" Valentine
Brutus "The Barber" Beefcake (1988)
as Greg "The Hammer" Valentine
WCW World War 3 1997 (1997)
as Greg "The Hammer" Valentine
WWE Superstars & Stripes Forever: The March to WrestleMania VII (1991)
as Greg "The Hammer" Valentine
The Ultimate Warrior (1989)
as Greg "The Hammer" Valentine
WWE Los Angeles Wrestling: December '88 (1988)
as Greg "The Hammer" Valentine
WWE The Brawl to End it All (1984)
as Greg "The Hammer" Valentine
Tag Team Champions (1986)
as Greg Valentine
WWF/AJPW/NJPW Wrestling Summit (1990)
Actor
Ricky "The Dragon" Steamboat (1986)
as Greg "The Hammer" Valentine
WWE Hall of Fame 2004 (2004)
as Self
WCW Clash of The Champions XX: 20th Anniversary (1992)
as Greg "The Hammer" Valentine
WWE Maple Leaf Wrestling: December '85 (1985)
as Greg "The Hammer" Valentine
WWE The Ultimate Challenge Special: The March to WrestleMania VI (1990)
as Greg "The Hammer" Valentine
WWE Wrestling at The Meadowlands: May '89 (1989)
as Greg "The Hammer" Valentine
JCW Legends and Icons (2011)
Actor
WWE SuperTape: Volume 2 (1990)
as Greg "The Hammer" Valentine
WWE Wrestling at The Meadowlands: September '88 (1988)
as Greg "The Hammer" Valentine
Bob Uecker's Wacky World of Sports (1987)
as Greg "The Hammer" Valentine
Wrestling's Most Embarrassing Moments (1987)
as Greg "The Hammer" Valentine
350 Days (2019)
as Self
Demolition: Witness the Power (1989)
as Greg "The Hammer" Valentine
WCW Beach Blast (1992)
as Greg "The Hammer" Valentine
WWF Hulkamania 1 (1985)
as Greg Valentine
The British Bulldogs (1986)
as Greg Valentine
Heroes of Wrestling (1999)
as Greg "The Hammer" Valentine
The WWF's Amazing Managers (1985)
as Greg 'The Hammer' Valentine
WWE Maple Leaf Wrestling: April '89 (1989)
as Greg "The Hammer" Valentine
The Best of the WWF: volume 7 (1986)
as Greg "The Hammer" Valentine
WWE U.K. Rampage 1991 (1991)
as Greg "The Hammer" Valentine
Wrestling Superheroes (1990)
as Greg "The Hammer" Valentine
The Best of the WWF: volume 16 Around the World (1988)
as Greg "The Hammer" Valentine
At What Cost? Anatomy of Professional Wrestling (2015)
as Himself
WWE Maple Leaf Wrestling: September '84 (1984)
as Greg "The Hammer" Valentine
Most Unusual Matches (1985)
as Greg "The Hammer" Valentine
WWE Houston Wrestling: December '87 (1987)
as Greg "The Hammer" Valentine
WWE Maple Leaf Wrestling: April '85 (1985)
as Greg "The Hammer" Valentine
WWE Maple Leaf Wrestling: January '87 (1987)
as Greg "The Hammer" Valentine
The Best of the WWF: volume 10 (1987)
as Greg "The Hammer" Valentine
The Immortal Hulk Hogan (1992)
as Greg Valentine
WWE Maple Leaf Wrestling: July '88 (1988)
as Greg "The Hammer" Valentine
WWE Houston Wrestling: October '87 (1987)
as Greg "The Hammer" Valentine
Battle of the WWE Superstars (1990)
as Greg Valentine
The Best of the WWF: volume 5 (1986)
as Greg "The Hammer" Valentine
The Best of the WWF: volume 20 (1989)
as Greg "The Hammer" Valentine
WWE U.K. Rampage 1988 (1988)
as Greg "The Hammer" Valentine
NWA Boogie Jam (1984)
as Greg Valentine
The Best of the WWF: volume 4 (1985)
as Greg "The Hammer" Valentine
WWE Maple Leaf Wrestling: September '85 (1985)
as Greg "The Hammer" Valentine
The Best of the WWF: volume 9 (1986)
as Greg "The Hammer" Valentine
WWE Maple Leaf Wrestling: October '85 (1985)
as Greg "The Hammer" Valentine
World Wrestling Legends: 6:05 - The Reunion (2005)
as Greg Valentine
The Best of the WWF: volume 14 (1987)
as Greg "The Hammer" Valentine
WWE Maple Leaf Wrestling: October '84 (1984)
as Greg "The Hammer" Valentine
WWE Los Angeles Wrestling: January '89 (1989)
as Greg "The Hammer" Valentine
Fan Favorites (1989)
as Greg Valentine
WWE Houston Wrestling: October '86 (1986)
as Greg "The Hammer" Valentine
WWE Maple Leaf Wrestling: June '87 (1987)
as Greg "The Hammer" Valentine
Behind the Ropes: The Greatest Fraternity in the World (2015)
as Himself
WWE Maple Leaf Wrestling: April '88 (1988)
as Greg "The Hammer" Valentine
NWA The Race to Starrcade (1983)
as Greg Valentine
The Best of the WWF: volume 11 (1987)
as Greg "The Hammer" Valentine
NWA Sam Muchnick Retirement Show (1982)
as Greg Valentine
Timeline The History of WWE – 1985 – As Told By Greg Valentine (2011)
as Himself