John Wisniski Jr.

Acting·Sep 20, 1951·Seattle, Washington, USA

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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.

Film	Credit
Midnight Massacre2025 · Caepio	Caepio
Chris Jericho's 30th Anniversary Celebration2020 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWE: The U.S. Championship: A Legacy of Greatness2016 · Greg 'The Hammer' Valentine (archive footage)	Greg 'The Hammer' Valentine (archive footage)
JJCW Legends and Icons2011 · Actor	Actor
WWE: The History Of The WWE Championship2006 · Actor	Actor
WWorld Wrestling Legends: 6:05 - The Reunion2005 · Greg Valentine	Greg Valentine
Heroes of Wrestling1999 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WCW World War 3 19971997 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWE Royal Rumble 19941994 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWE Survivor Series 19931993 · The Blue Knight	The Blue Knight
The Immortal Hulk Hogan1992 · Greg Valentine	Greg Valentine
WCW Clash of The Champions XX: 20th Anniversary1992 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WCW Beach Blast1992 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WCW WrestleWar 19921992 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWE SuperTape: Volume 51992 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWE Royal Rumble 19921992 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWE Rampage '911991 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWE SummerSlam 19911991 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWE WrestleFest '911991 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWE U.K. Rampage 19911991 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWE Mega Matches1991 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWE WrestleMania VII1991 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWE Superstars & Stripes Forever: The March to WrestleMania VII1991 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWE Funniest Moments1991 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWE Royal Rumble 19911991 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWE Survivor Series 19901990 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWE Hottest Matches1990 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
Battle of the WWE Superstars1990 · Greg Valentine	Greg Valentine
WWE SuperTape: Volume 21990 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWF/AJPW/NJPW Wrestling Summit1990 · Actor	Actor
WWE The Ultimate Challenge Special: The March to WrestleMania VI1990 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
Wrestling Superheroes1990 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWE Royal Rumble 19901990 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWE Survivor Series 19891989 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWE SummerSlam 19891989 · Greg Valentine	Greg Valentine
Demolition: Witness the Power1989 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
Fan Favorites1989 · Greg Valentine	Greg Valentine
The Best of the WWF: volume 201989 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
The Ultimate Warrior1989 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWWE Wrestling at The Meadowlands: May '891989 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWWE Maple Leaf Wrestling: April '891989 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWE WrestleMania V1989 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWWE Los Angeles Wrestling: January '891989 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWE Royal Rumble 19891989 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWWE Los Angeles Wrestling: December '881988 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWE Survivor Series 19881988 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
Macho Madness1988 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWWE U.K. Rampage 19881988 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWWE Wrestling at The Meadowlands: September '881988 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
The Best of the WWF: volume 16 Around the World1988 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWWE Maple Leaf Wrestling: July '881988 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWWE Maple Leaf Wrestling: April '881988 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWE WrestleMania IV1988 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
Brutus "The Barber" Beefcake1988 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
The Best of the WWF: volume 141987 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
Wrestling's Most Embarrassing Moments1987 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWWE Houston Wrestling: December '871987 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWE Survivor Series 19871987 · Greg Valentine	Greg Valentine
WWWE Houston Wrestling: October '871987 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWWE Maple Leaf Wrestling: June '871987 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
The Best of the WWF: volume 111987 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWE WrestleMania III1987 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
The Best of the WWF: volume 101987 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWWE Maple Leaf Wrestling: January '871987 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWWE Wrestling at The Meadowlands: January '871987 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
Bob Uecker's Wacky World of Sports1987 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
Inside the Steel Cage1986 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWWE Houston Wrestling: October '861986 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
The British Bulldogs1986 · Greg Valentine	Greg Valentine
The Best of the WWF: volume 91986 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWE The Big Event1986 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
The Best of the WWF: volume 71986 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
Ricky "The Dragon" Steamboat1986 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WrestleMania II1986 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWE Grudge Match1986 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
Tag Team Champions1986 · Greg Valentine	Greg Valentine
The Best of the WWF: volume 51986 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
The WWF's Amazing Managers1985 · Greg 'The Hammer' Valentine	Greg 'The Hammer' Valentine
WWWE Maple Leaf Wrestling: December '851985 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWWE Maple Leaf Wrestling: October '851985 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWWE Maple Leaf Wrestling: September '851985 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
The Best of the WWF: volume 41985 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWWE Maple Leaf Wrestling: April '851985 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WrestleMania1985 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
Most Unusual Matches1985 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWF Hulkamania 11985 · Greg Valentine	Greg Valentine
WWWE Maple Leaf Wrestling: October '841984 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWWE Maple Leaf Wrestling: September '841984 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
WWE The Brawl to End it All1984 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
NWA Boogie Jam1984 · Greg Valentine	Greg Valentine
NWA Starrcade 19831983 · Greg "The Hammer" Valentine	Greg "The Hammer" Valentine
NNWA The Race to Starrcade1983 · Greg Valentine	Greg Valentine
NWA The Final Conflict1983 · Greg Valentine	Greg Valentine
NNWA Sam Muchnick Retirement Show1982 · Greg Valentine	Greg Valentine