John Wisniski Jr.
ActingBorn 1951-09-20 · Seattle, Washington, USA
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.
Midnight Massacre
Oct 25, 2025
Chris Jericho's 30th Anniversary Celebration
Oct 07, 2020Rated 7.7 out of 10
350 Days
Apr 02, 2019Rated 5.1 out of 10
Headstrong
Feb 19, 2019Rated 6 out of 10
WWE: The U.S. Championship: A Legacy of Greatness
Apr 26, 2016Rated 9.2 out of 10
Behind the Ropes: The Greatest Fraternity in the World
Dec 31, 2015
At What Cost? Anatomy of Professional Wrestling
Apr 25, 2015Rated 10 out of 10
WWE: 150 Best Pay-Per-View Matches, Vol 1
Mar 11, 2014Rated 10 out of 10
WWE: Starrcade - The Essential Collection
Jan 03, 2012
Timeline The History of WWE – 1985 – As Told By Greg Valentine
Jun 01, 2011JCW Legends and Icons
Dec 08, 2011
WWE: The History Of The Intercontinental Championship
Nov 25, 2008Rated 7.3 out of 10
WWE: The History Of The WWE Championship
Sep 05, 2006Rated 10 out of 10World Wrestling Legends: 6:05 - The Reunion
Apr 29, 2005
The Greatest Wrestling Stars of the '80s
Jun 14, 2005Rated 7.8 out of 10
WWE Hall of Fame 2004
Mar 12, 2004Rated 8.2 out of 10
Heroes of Wrestling
Oct 10, 1999Rated 1 out of 10
WCW World War 3 1997
Nov 23, 1997Rated 7.5 out of 10
WWE Royal Rumble 1994
Jan 22, 1994Rated 6.9 out of 10
WWE Survivor Series 1993
Nov 24, 1993Rated 6.2 out of 10
WWE SuperTape: Volume 5
Feb 27, 1992
WCW Beach Blast
Jun 20, 1992Rated 8 out of 10
WCW Clash of The Champions XX: 20th Anniversary
Sep 02, 1992
WWE Royal Rumble 1992
Jan 19, 1992Rated 6.9 out of 10
WCW WrestleWar 1992
May 17, 1992Rated 6 out of 10
The Immortal Hulk Hogan
Nov 05, 1992
WWE WrestleFest '91
Jul 25, 1991
WWE Mega Matches
Mar 28, 1991
WWE Rampage '91
Oct 24, 1991
WWE WrestleMania VII
Mar 24, 1991Rated 7.3 out of 10
WWE Royal Rumble 1991
Jan 19, 1991Rated 7.1 out of 10
WWE SummerSlam 1991
Aug 26, 1991Rated 7.7 out of 10
WWE Superstars & Stripes Forever: The March to WrestleMania VII
Mar 17, 1991
WWE U.K. Rampage 1991
Apr 21, 1991Rated 6 out of 10
WWE Funniest Moments
Feb 27, 1991
Battle of the WWE Superstars
Aug 23, 1990
WWE Hottest Matches
Oct 25, 1990
WWE SuperTape: Volume 2
Jul 25, 1990
WWE Survivor Series 1990
Nov 22, 1990Rated 7.7 out of 10
WWF/AJPW/NJPW Wrestling Summit
Apr 13, 1990
WWE The Ultimate Challenge Special: The March to WrestleMania VI
Mar 25, 1990
WWE Royal Rumble 1990
Jan 21, 1990Rated 6.1 out of 10
Wrestling Superheroes
Mar 21, 1990
WWE WrestleMania V
Apr 02, 1989Rated 7.3 out of 10
Demolition: Witness the Power
Aug 09, 1989
The Ultimate Warrior
Jun 28, 1989
Fan Favorites
Aug 09, 1989
The Best of the WWF: volume 20
Aug 09, 1989WWE Maple Leaf Wrestling: April '89
Apr 23, 1989WWE Los Angeles Wrestling: January '89
Jan 29, 1989WWE Wrestling at The Meadowlands: May '89
May 08, 1989
WWE Royal Rumble 1989
Jan 15, 1989Rated 5.8 out of 10
WWE Survivor Series 1989
Nov 23, 1989Rated 7.8 out of 10
WWE SummerSlam 1989
Aug 28, 1989Rated 6.7 out of 10
WWE Survivor Series 1988
Nov 24, 1988Rated 8 out of 10
The Best of the WWF: volume 16 Around the World
Jul 27, 1988WWE U.K. Rampage 1988
Oct 07, 1988WWE Los Angeles Wrestling: December '88
Dec 17, 1988WWE Maple Leaf Wrestling: April '88
Apr 24, 1988WWE Maple Leaf Wrestling: July '88
Jul 24, 1988WWE Wrestling at The Meadowlands: September '88
Sep 11, 1988
WWE WrestleMania IV
Mar 27, 1988Rated 7.2 out of 10
Macho Madness
Oct 19, 1988
Brutus "The Barber" Beefcake
Mar 03, 1988
WWE WrestleMania III
Mar 29, 1987Rated 7.4 out of 10
Bob Uecker's Wacky World of Sports
Jan 01, 1987
The Best of the WWF: volume 10
Mar 01, 1987
The Best of the WWF: volume 11
Jun 24, 1987
The Best of the WWF: volume 14
Dec 15, 1987WWE Houston Wrestling: October '87
Oct 09, 1987WWE Houston Wrestling: December '87
Dec 11, 1987WWE Maple Leaf Wrestling: January '87
Jan 11, 1987WWE Maple Leaf Wrestling: June '87
Jun 28, 1987WWE Wrestling at The Meadowlands: January '87
Jan 05, 1987
WWE Survivor Series 1987
Nov 26, 1987Rated 8.4 out of 10
Wrestling's Most Embarrassing Moments
Dec 15, 1987Rated 10 out of 10
WrestleMania II
Apr 07, 1986Rated 6.4 out of 10
The British Bulldogs
Oct 15, 1986Rated 4 out of 10
Ricky "The Dragon" Steamboat
May 02, 1986Rated 10 out of 10
The Best of the WWF: volume 5
Jan 01, 1986
The Best of the WWF: volume 7
Jun 06, 1986
The Best of the WWF: volume 9
Oct 15, 1986WWE Houston Wrestling: October '86
Oct 19, 1986
Tag Team Champions
Mar 01, 1986
WWE The Big Event
Aug 28, 1986Rated 8 out of 10
Inside the Steel Cage
Dec 11, 1986
WWE Grudge Match
Mar 27, 1986
WrestleMania
Mar 31, 1985Rated 6.6 out of 10
The Best of the WWF: volume 4
Sep 01, 1985
Most Unusual Matches
Jan 01, 1985Rated 9 out of 10
Hulkamania 1
Jan 01, 1985WWE Maple Leaf Wrestling: April '85
Apr 21, 1985WWE Maple Leaf Wrestling: September '85
Sep 22, 1985WWE Maple Leaf Wrestling: October '85
Oct 13, 1985WWE Maple Leaf Wrestling: December '85
Dec 15, 1985
The WWF's Amazing Managers
Dec 31, 1985WWE Maple Leaf Wrestling: September '84
Sep 23, 1984WWE Maple Leaf Wrestling: October '84
Oct 21, 1984
NWA Boogie Jam
Mar 17, 1984
WWE The Brawl to End it All
Jul 23, 1984Rated 10 out of 10
NWA Starrcade 1983
Nov 24, 1983Rated 7.3 out of 10
NWA The Final Conflict
Mar 12, 1983NWA The Race to Starrcade
Sep 07, 1983NWA Sam Muchnick Retirement Show
Jan 01, 1982