John Wisniski Jr.
Acting • AGE 74
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 fo...
Acting
Midnight Massacre
Caepio
2025
Biography: WWE Legends
Greg "The Hammer" Valentine
2021
WWE's Most Wanted Treasures
Greg "The Hammer" Valentine
2021
Chris Jericho's 30th Anniversary Celebration
Greg "The Hammer" Valentine
2020
Undertaker: The Last Ride
Greg Valentine (archive footage)
2020
All Elite Wrestling: Dynamite
Greg Valentine
2019
350 Days
Self
2019
Headstrong
Self
2019
WWE: The U.S. Championship: A Legacy of Greatness
Greg 'The Hammer' Valentine (archive footage)
2016
Behind the Ropes: The Greatest Fraternity in the World
Himself
2015
At What Cost? Anatomy of Professional Wrestling
Himself
2015
WWE: Starrcade - The Essential Collection
Himself
2012
Timeline: The History of WWE – 1985 – As Told By Greg Valentine
Himself
2011
WWE: The History Of The Intercontinental Championship
Himself
2008
WWE: The History Of The WWE Championship
2006
The Greatest Wrestling Stars of the '80s
Self
2005
WWE Hall of Fame 2004
Self
2004
Heroes of Wrestling
Greg "The Hammer" Valentine
1999
WCW World War 3 1997
Greg "The Hammer" Valentine
1997
WWE Royal Rumble 1994
Greg "The Hammer" Valentine
1994
WWE Survivor Series 1993
The Blue Knight
1993
Raw
Greg "The Hammer" Valentine
1993
The Immortal Hulk Hogan
Greg Valentine
1992
WCW Clash of The Champions XX: 20th Anniversary
Greg "The Hammer" Valentine
1992
WCW Beach Blast
Greg "The Hammer" Valentine
1992
WCW WrestleWar 1992
Greg "The Hammer" Valentine
1992
WWE SuperTape: Volume 5
Greg "The Hammer" Valentine
1992
WWE Royal Rumble 1992
Greg "The Hammer" Valentine
1992
WWE Rampage '91
Greg "The Hammer" Valentine
1991
WWE SummerSlam 1991
Greg "The Hammer" Valentine
1991
WWE WrestleFest '91
Greg "The Hammer" Valentine
1991
WWE U.K. Rampage 1991
Greg "The Hammer" Valentine
1991
WWE Mega Matches
Greg "The Hammer" Valentine
1991
WWE WrestleMania VII
Greg "The Hammer" Valentine
1991
WWE Superstars & Stripes Forever: The March to WrestleMania VII
Greg "The Hammer" Valentine
1991
WWE Funniest Moments
Greg "The Hammer" Valentine
1991
WWE Royal Rumble 1991
Greg "The Hammer" Valentine
1991
WWE Survivor Series 1990
Greg "The Hammer" Valentine
1990
WWE Hottest Matches
Greg "The Hammer" Valentine
1990
Battle of the WWE Superstars
Greg Valentine
1990
WWE SuperTape: Volume 2
Greg "The Hammer" Valentine
1990
WWF/AJPW/NJPW Wrestling Summit
1990
WWE The Ultimate Challenge Special: The March to WrestleMania VI
Greg "The Hammer" Valentine
1990
Wrestling Superheroes
Greg "The Hammer" Valentine
1990
WWE Royal Rumble 1990
Greg "The Hammer" Valentine
1990
WWE Survivor Series 1989
Greg "The Hammer" Valentine
1989
WWE SummerSlam 1989
Greg Valentine
1989
Demolition: Witness the Power
Greg "The Hammer" Valentine
1989
Fan Favorites
Greg Valentine
1989
The Best of the WWF: volume 20
Greg "The Hammer" Valentine
1989
The Ultimate Warrior
Greg "The Hammer" Valentine
1989
WWE WrestleMania V
Greg "The Hammer" Valentine
1989
WWE Royal Rumble 1989
Greg "The Hammer" Valentine
1989
WWE Survivor Series 1988
Greg "The Hammer" Valentine
1988
Macho Madness
Greg "The Hammer" Valentine
1988
The Best of the WWF: volume 16 Around the World
Greg "The Hammer" Valentine
1988
WWE WrestleMania IV
Greg "The Hammer" Valentine
1988
Clash of the Champions
Greg "The Hammer" Valentine
1988
Brutus "The Barber" Beefcake
Greg "The Hammer" Valentine
1988
The Best of the WWF: volume 14
Greg "The Hammer" Valentine
1987
Wrestling's Most Embarrassing Moments
Greg "The Hammer" Valentine
1987
WWE Survivor Series 1987
Greg Valentine
1987
The Best of the WWF: volume 11
Greg "The Hammer" Valentine
1987
WWE WrestleMania III
Greg "The Hammer" Valentine
1987
The Best of the WWF: volume 10
Greg "The Hammer" Valentine
1987
Bob Uecker's Wacky World of Sports
Greg "The Hammer" Valentine
1987
Inside the Steel Cage
Greg "The Hammer" Valentine
1986
The British Bulldogs
Greg Valentine
1986
The Best of the WWF: volume 9
Greg "The Hammer" Valentine
1986
WWF Wrestling Challenge
Greg Valentine
1986
WWF Superstars
Greg "The Hammer" Valentine
1986
WWE The Big Event
Greg "The Hammer" Valentine
1986
The Best of the WWF: volume 7
Greg "The Hammer" Valentine
1986
Ricky "The Dragon" Steamboat
Greg "The Hammer" Valentine
1986
WrestleMania II
Greg "The Hammer" Valentine
1986
WWE Grudge Match
Greg "The Hammer" Valentine
1986
Tag Team Champions
Greg Valentine
1986
The Best of the WWF: volume 5
Greg "The Hammer" Valentine
1986
The WWF's Amazing Managers
Greg 'The Hammer' Valentine
1985
The Best of the WWF: volume 4
Greg "The Hammer" Valentine
1985
WWE Saturday Night's Main Event
Greg Valentine
1985
WrestleMania
Greg "The Hammer" Valentine
1985
WWE Pay Per View
1985
Most Unusual Matches
Greg "The Hammer" Valentine
1985
WWF Hulkamania 1
Greg Valentine
1985
WWE The Brawl to End it All
Greg "The Hammer" Valentine
1984
Tuesday Night Titans
Greg "The Hammer" Valentine
1984
NWA Boogie Jam
Greg Valentine
1984
NWA Starrcade 1983
Greg "The Hammer" Valentine
1983
WCW Arena Shows
Greg Valentine
1983
NWA The Final Conflict
Greg Valentine
1983
Mid-Atlantic Championship Wrestling
Greg Valentine
1981
WWF All-Star Wrestling
Greg Valentine
1975
WWE Old School
Greg Valentine
1973