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