John Wisniski Jr.
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.
119 acting credits
Acting · 119
Raw
1993
All Elite Wrestling: Dynamite
2019
WWE Saturday Night's Main Event
1985
WWF Superstars
1986
WWF Wrestling Challenge
1986
WWE Pay Per View
1985
WWE Old School
1973
Biography: WWE Legends
2021
WWF All-Star Wrestling
1975
Clash of the Champions
1988
Mid-Atlantic Championship Wrestling
1981
Undertaker: The Last Ride
2020
WWE's Most Wanted Treasures
2021
Tuesday Night Titans
1984
WrestleMania II
1986
Chris Jericho's 30th Anniversary Celebration
2020
WWE: 150 Best Pay-Per-View Matches, Vol 1
2014
WWE WrestleMania VII
1991
WWE WrestleMania III
1987
WWE: The U.S. Championship: A Legacy of Greatness
2016
WCW Arena Shows
1983
WrestleMania
1985
WWE: The History Of The Intercontinental Championship
2008
WWE WrestleMania V
1989
WWE SummerSlam 1991
1991
The Greatest Wrestling Stars of the '80s
2005
WWE Survivor Series 1989
1989
WWE: The History Of The WWE Championship
2006
WWE Rampage '91
1991
AWF Warriors of Wrestling
1995
Midnight Massacre
2025
WWE SummerSlam 1989
1989
WWE Royal Rumble 1994
1994
WCW Beach Blast
1992
WWE Survivor Series 1988
1988
WWE Survivor Series 1987
1987
WWE Royal Rumble 1991
1991
WWE Survivor Series 1990
1990
NWA Starrcade 1983
1983
WWE WrestleFest '91
1991
WWE WrestleMania IV
1988
WWE Wrestling at The Meadowlands: January '87
1987
WCW World War 3 1997
1997
WWE Wrestling at The Meadowlands: May '89
1989
WCW WrestleWar 1992
1992
WWE Houston Wrestling: October '86
1986
WWE Royal Rumble 1989
1989
WCW Clash of The Champions XX: 20th Anniversary
1992
WWE Houston Wrestling: October '87
1987
WWE Royal Rumble 1990
1990
The Best of the WWF: volume 16 Around the World
1988
WWE Hall of Fame 2004
2004
The British Bulldogs
1986
Brutus "The Barber" Beefcake
1988
WWE: Starrcade - The Essential Collection
2012
Wrestling's Most Embarrassing Moments
1987
The Best of the WWF: volume 4
1985
The Best of the WWF: volume 20
1989
WWE Wrestling at The Meadowlands: September '88
1988
WWE Survivor Series 1993
1993
The WWF's Amazing Managers
1985
WWE The Brawl to End it All
1984
350 Days
2019
Bob Uecker's Wacky World of Sports
1987
WWE Maple Leaf Wrestling: April '89
1989
WWE Mega Matches
1991
WWE The Ultimate Challenge Special: The March to WrestleMania VI
1990
The Best of the WWF: volume 7
1986
WWE Maple Leaf Wrestling: April '85
1985
WWE Maple Leaf Wrestling: June '87
1987
WWF/AJPW/NJPW Wrestling Summit
1990
WWE Superstars & Stripes Forever: The March to WrestleMania VII
1991
Heroes of Wrestling
1999
Demolition: Witness the Power
1989
WWE Grudge Match
1986
WWE Royal Rumble 1992
1992
Ricky "The Dragon" Steamboat
1986
At What Cost? Anatomy of Professional Wrestling
2015
WWE Houston Wrestling: December '87
1987
WWE Maple Leaf Wrestling: October '84
1984
WWE Funniest Moments
1991
WWE Los Angeles Wrestling: January '89
1989
WWE U.K. Rampage 1991
1991
WWE SuperTape: Volume 5
1992
WWE Maple Leaf Wrestling: October '85
1985
The Best of the WWF: volume 9
1986
WWE Maple Leaf Wrestling: July '88
1988
NWA Boogie Jam
1984
Battle of the WWE Superstars
1990
WWE The Big Event
1986
WWE Hottest Matches
1990
WWE U.K. Rampage 1988
1988
Wrestling Superheroes
1990
WWE Los Angeles Wrestling: December '88
1988
Macho Madness
1988
Most Unusual Matches
1985
WWE Maple Leaf Wrestling: January '87
1987
WWE Maple Leaf Wrestling: September '84
1984
World Wrestling Legends: 6:05 - The Reunion
2005
Inside the Steel Cage
1986
The Best of the WWF: volume 10
1987
WWE Maple Leaf Wrestling: April '88
1988
The Best of the WWF: volume 14
1987
WWE SuperTape: Volume 2
1990
WWE Maple Leaf Wrestling: December '85
1985
WWE Maple Leaf Wrestling: September '85
1985
The Best of the WWF: volume 5
1986
NWA The Race to Starrcade
1983
The Immortal Hulk Hogan
1992
Timeline: The History of WWE – 1985 – As Told By Greg Valentine
2011
JCW Legends and Icons
2011
Fan Favorites
1989
NWA The Final Conflict
1983
NWA Sam Muchnick Retirement Show
1982
Tag Team Champions
1986
The Ultimate Warrior
1989
The Best of the WWF: volume 11
1987
WWF Hulkamania 1
1985
Behind the Ropes: The Greatest Fraternity in the World
2015