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.
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- Born:
- Sep 20, 1951 In Seattle, Washington, USA
- Movie/TV Credits:
- 44
- First Appeared:
- In the movie NWA Starrcade 1983 1983-11-24
- Latest Project:
- Movie Midnight Massacre 2025-10-25
Known For
Filmography
| Movie | Midnight Massacre | Caepio | 2025-10-25 |
| Movie | Chris Jericho's 30th Anniversary Celebration | Greg "The Hammer" Valentine | 2020-10-07 |
| Movie | WWE: The U.S. Championship: A Legacy of Greatness | Greg 'The Hammer' Valentine (archive footage) | 2016-04-26 |
| Movie | At What Cost? Anatomy of Professional Wrestling | Himself | 2015-04-25 |
| Movie | WWE: Starrcade - The Essential Collection | Himself | 2012-01-03 |
| Movie | WWE: The History Of The Intercontinental Championship | Himself | 2008-11-25 |
| Movie | WWE Hall of Fame 2004 | Unknown | 2004-03-12 |
| Movie | WCW World War 3 1997 | Greg "The Hammer" Valentine | 1997-11-23 |
| Movie | WWE Royal Rumble 1994 | Greg "The Hammer" Valentine | 1994-01-22 |
| Series | Raw | Greg "The Hammer" Valentine | 1993-01-11 |
| Movie | WWE Survivor Series 1993 | The Blue Knight | 1993-11-24 |
| Movie | WCW Wrestle War: WarGames | Greg "The Hammer" Valentine | 1992-05-17 |
| Movie | WWE Royal Rumble 1992 | Greg "The Hammer" Valentine | 1992-01-19 |
| Movie | WCW Beach Blast | Greg "The Hammer" Valentine | 1992-06-20 |
| Movie | WWE Funniest Moments | Greg "The Hammer" Valentine | 1991-02-27 |
| Movie | WWE Royal Rumble 1991 | Greg "The Hammer" Valentine | 1991-01-19 |
| Movie | WWE WrestleMania VII | Greg "The Hammer" Valentine | 1991-03-24 |
| Movie | WWE U.K. Rampage 1991 | Greg "The Hammer" Valentine | 1991-04-21 |
| Movie | WWE Mega Matches | Greg "The Hammer" Valentine | 1991-03-28 |
| Movie | WWE SummerSlam 1991 | Greg "The Hammer" Valentine | 1991-08-26 |
| Movie | Wrestling Superheroes | Greg "The Hammer" Valentine | 1990-03-21 |
| Movie | WWE Royal Rumble 1990 | Greg "The Hammer" Valentine | 1990-01-21 |
| Movie | WWE Hottest Matches | Greg "The Hammer" Valentine | 1990-10-25 |
| Movie | WWE Survivor Series 1990 | Greg "The Hammer" Valentine | 1990-11-22 |
| Movie | Battle of the WWE Superstars | Greg Valentine | 1990-08-23 |
| Movie | WWE WrestleMania V | Greg "The Hammer" Valentine | 1989-04-02 |
| Movie | WWE Royal Rumble 1989 | Greg "The Hammer" Valentine | 1989-01-15 |
| Movie | The Ultimate Warrior | Greg "The Hammer" Valentine | 1989-06-28 |
| Movie | WWE Demolition | Greg "The Hammer" Valentine | 1989-08-09 |
| Movie | WWE Survivor Series 1989 | Greg "The Hammer" Valentine | 1989-11-23 |
| Movie | WWE SummerSlam 1989 | Greg Valentine | 1989-08-28 |
| Movie | Macho Madness | Greg "The Hammer" Valentine | 1988-10-19 |
| Movie | WWE WrestleMania IV | Greg "The Hammer" Valentine | 1988-03-27 |
| Movie | WWE Survivor Series 1988 | Greg "The Hammer" Valentine | 1988-11-24 |
| Movie | WWE Survivor Series 1987 | Greg Valentine | 1987-11-26 |
| Movie | WrestleMania II | Greg "The Hammer" Valentine | 1986-04-07 |
| Movie | Tag Team Champions | Greg Valentine | 1986-03-01 |
| Movie | WWE The Big Event | Greg "The Hammer" Valentine | 1986-08-28 |
| Movie | Inside the Steel Cage | Greg "The Hammer" Valentine | 1986-12-11 |
| Movie | WrestleMania | Greg "The Hammer" Valentine | 1985-03-31 |
| Movie | WWF Hulkamania 1 | Greg Valentine | 1985-01-01 |
| Series | Saturday Night's Main Event | Greg "The Hammer" Valentine | 1985-05-11 |
| Movie | The Best of the WWF: volume 4 | Greg "The Hammer" Valentine | 1985-09-01 |
| Movie | NWA Starrcade 1983 | Greg "The Hammer" Valentine | 1983-11-24 |