John Wisniski Jr.
Acting
125
Acting Credits
Biography
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
Raw
Greg "The Hammer" Valentine
WWF Superstars
Greg "The Hammer" Valentine
All Elite Wrestling: Dynamite
Greg Valentine
WWF Wrestling Challenge
Greg Valentine
WWF Wrestling Challenge
Greg "The Hammer" Valentine
WWE Saturday Night's Main Event
Greg Valentine
WWE Saturday Night's Main Event
WWE Saturday Night's Main Event
Greg "The Hammer" Valentine
Filmography
Midnight Massacre
2025
as Caepio
Biography: WWE Legends
2021
as Greg "The Hammer" Valentine
WWE's Most Wanted Treasures
2021
as Greg "The Hammer" Valentine
Chris Jericho's 30th Anniversary Celebration
2020
as Greg "The Hammer" Valentine
Undertaker: The Last Ride
2020
as Greg Valentine (archive footage)
350 Days
2019
as Self
Headstrong
2019
as Self
All Elite Wrestling: Dynamite
2019
as Greg Valentine
WWE: The U.S. Championship: A Legacy of Greatness
2016
as Greg 'The Hammer' Valentine (archive footage)
Behind the Ropes: The Greatest Fraternity in the World
2015
as Himself
At What Cost? Anatomy of Professional Wrestling
2015
as Himself
WWE: 150 Best Pay-Per-View Matches, Vol 1
2014
as Himself
WWE: Starrcade - The Essential Collection
2012
as Himself
Timeline The History of WWE – 1985 – As Told By Greg Valentine
2011
as Himself
JCW Legends and Icons
2011
WWE: The History Of The Intercontinental Championship
2008
as Himself
WWE: The History Of The WWE Championship
2006
World Wrestling Legends: 6:05 - The Reunion
2005
as Greg Valentine
The Greatest Wrestling Stars of the '80s
2005
as Self
WWE Hall of Fame 2004
2004
as Self
Heroes of Wrestling
1999
as Greg "The Hammer" Valentine
WCW World War 3 1997
1997
as Greg "The Hammer" Valentine
AWF Warriors of Wrestling
1995
as Greg "The Hammer" Valentine
WWE Royal Rumble 1994
1994
as Greg "The Hammer" Valentine
WWE Survivor Series 1993
1993
as The Blue Knight
Raw
1993
as Greg "The Hammer" Valentine
WWE SuperTape: Volume 5
1992
as Greg "The Hammer" Valentine
WCW Beach Blast
1992
as Greg "The Hammer" Valentine
WCW Clash of The Champions XX: 20th Anniversary
1992
as Greg "The Hammer" Valentine
WWE Royal Rumble 1992
1992
as Greg "The Hammer" Valentine
WCW WrestleWar 1992
1992
as Greg "The Hammer" Valentine
The Immortal Hulk Hogan
1992
as Greg Valentine
WWE WrestleFest '91
1991
as Greg "The Hammer" Valentine
WWE Mega Matches
1991
as Greg "The Hammer" Valentine
WWE Rampage '91
1991
as Greg "The Hammer" Valentine
WWE WrestleMania VII
1991
as Greg "The Hammer" Valentine
WWE Royal Rumble 1991
1991
as Greg "The Hammer" Valentine
WWE SummerSlam 1991
1991
as Greg "The Hammer" Valentine
WWE Superstars & Stripes Forever: The March to WrestleMania VII
1991
as Greg "The Hammer" Valentine
WWE U.K. Rampage 1991
1991
as Greg "The Hammer" Valentine
WWE Funniest Moments
1991
as Greg "The Hammer" Valentine
Battle of the WWE Superstars
1990
as Greg Valentine
WWE Hottest Matches
1990
as Greg "The Hammer" Valentine
WWE SuperTape: Volume 2
1990
as Greg "The Hammer" Valentine
WWE Survivor Series 1990
1990
as Greg "The Hammer" Valentine
WWF/AJPW/NJPW Wrestling Summit
1990
WWE The Ultimate Challenge Special: The March to WrestleMania VI
1990
as Greg "The Hammer" Valentine
WWE Royal Rumble 1990
1990
as Greg "The Hammer" Valentine
Wrestling Superheroes
1990
as Greg "The Hammer" Valentine
WWE WrestleMania V
1989
as Greg "The Hammer" Valentine
Demolition: Witness the Power
1989
as Greg "The Hammer" Valentine
The Ultimate Warrior
1989
as Greg "The Hammer" Valentine
Fan Favorites
1989
as Greg Valentine
The Best of the WWF: volume 20
1989
as Greg "The Hammer" Valentine
WWE Maple Leaf Wrestling: April '89
1989
as Greg "The Hammer" Valentine
WWE Los Angeles Wrestling: January '89
1989
as Greg "The Hammer" Valentine
WWE Wrestling at The Meadowlands: May '89
1989
as Greg "The Hammer" Valentine
WWE Royal Rumble 1989
1989
as Greg "The Hammer" Valentine
WWE Survivor Series 1989
1989
as Greg "The Hammer" Valentine
WWE SummerSlam 1989
1989
as Greg Valentine
WWE Survivor Series 1988
1988
as Greg "The Hammer" Valentine
The Best of the WWF: volume 16 Around the World
1988
as Greg "The Hammer" Valentine
WWE U.K. Rampage 1988
1988
as Greg "The Hammer" Valentine
WWE Los Angeles Wrestling: December '88
1988
as Greg "The Hammer" Valentine
WWE Maple Leaf Wrestling: April '88
1988
as Greg "The Hammer" Valentine
WWE Maple Leaf Wrestling: July '88
1988
as Greg "The Hammer" Valentine
WWE Wrestling at The Meadowlands: September '88
1988
as Greg "The Hammer" Valentine
WWE WrestleMania IV
1988
as Greg "The Hammer" Valentine
Macho Madness
1988
as Greg "The Hammer" Valentine
Brutus "The Barber" Beefcake
1988
as Greg "The Hammer" Valentine
Clash of the Champions
1988
as Greg "The Hammer" Valentine
WWE WrestleMania III
1987
as Greg "The Hammer" Valentine
Bob Uecker's Wacky World of Sports
1987
as Greg "The Hammer" Valentine
The Best of the WWF: volume 10
1987
as Greg "The Hammer" Valentine
The Best of the WWF: volume 11
1987
as Greg "The Hammer" Valentine
The Best of the WWF: volume 14
1987
as Greg "The Hammer" Valentine
WWE Houston Wrestling: October '87
1987
as Greg "The Hammer" Valentine
WWE Houston Wrestling: December '87
1987
as Greg "The Hammer" Valentine
WWE Maple Leaf Wrestling: January '87
1987
as Greg "The Hammer" Valentine
WWE Maple Leaf Wrestling: June '87
1987
as Greg "The Hammer" Valentine
WWE Wrestling at The Meadowlands: January '87
1987
as Greg "The Hammer" Valentine
WWE Survivor Series 1987
1987
as Greg Valentine
Wrestling's Most Embarrassing Moments
1987
as Greg "The Hammer" Valentine
WrestleMania II
1986
as Greg "The Hammer" Valentine
The British Bulldogs
1986
as Greg Valentine
Ricky "The Dragon" Steamboat
1986
as Greg "The Hammer" Valentine
The Best of the WWF: volume 7
1986
as Greg "The Hammer" Valentine
The Best of the WWF: volume 5
1986
as Greg "The Hammer" Valentine
The Best of the WWF: volume 9
1986
as Greg "The Hammer" Valentine
WWE Houston Wrestling: October '86
1986
as Greg "The Hammer" Valentine
Tag Team Champions
1986
as Greg Valentine
WWE The Big Event
1986
as Greg "The Hammer" Valentine
Inside the Steel Cage
1986
as Greg "The Hammer" Valentine
WWE Grudge Match
1986
as Greg "The Hammer" Valentine
WWF Wrestling Challenge
1986
as Greg Valentine
WWF Wrestling Challenge
1986
as Greg "The Hammer" Valentine
WWF Superstars
1986
as Greg "The Hammer" Valentine
WrestleMania
1985
as Greg "The Hammer" Valentine
The Best of the WWF: volume 4
1985
as Greg "The Hammer" Valentine
Most Unusual Matches
1985
as Greg "The Hammer" Valentine
WWF Hulkamania 1
1985
as Greg Valentine
WWE Maple Leaf Wrestling: April '85
1985
as Greg "The Hammer" Valentine
WWE Maple Leaf Wrestling: September '85
1985
as Greg "The Hammer" Valentine
WWE Maple Leaf Wrestling: October '85
1985
as Greg "The Hammer" Valentine
WWE Maple Leaf Wrestling: December '85
1985
as Greg "The Hammer" Valentine
The WWF's Amazing Managers
1985
as Greg 'The Hammer' Valentine
WWE Saturday Night's Main Event
1985
as Greg Valentine
WWE Saturday Night's Main Event
1985
WWE Saturday Night's Main Event
1985
as Greg "The Hammer" Valentine
WWE Maple Leaf Wrestling: September '84
1984
as Greg "The Hammer" Valentine
WWE Maple Leaf Wrestling: October '84
1984
as Greg "The Hammer" Valentine
WWE The Brawl to End it All
1984
as Greg "The Hammer" Valentine
NWA Boogie Jam
1984
as Greg Valentine
Tuesday Night Titans
1984
as Greg "The Hammer" Valentine
Tuesday Night Titans
1984
as Greg Valentine
NWA Starrcade 1983
1983
as Greg "The Hammer" Valentine
NWA The Final Conflict
1983
as Greg Valentine
NWA The Race to Starrcade
1983
as Greg Valentine
WCW Arena Shows
1983
as Greg Valentine
NWA Sam Muchnick Retirement Show
1982
as Greg Valentine
Mid-Atlantic Championship Wrestling
1981
as Greg Valentine
WWF All-Star Wrestling
1975
as Greg Valentine
WWF All-Star Wrestling
1975
as Greg 'The Hammer' Valentine
WWE Old School
1973
as Greg Valentine
WWE Old School
1973
as Greg "The Hammer" Valentine