Oscar Gutierrez was born on December 12, 1974. He was trained by his uncle Rey Misterio Sr. and made his pro debut in 1989. He currently lives in San Diego, CA. He is married to Angie and has a daughter (Aalyah) and a son (Dominick). The battle with Eddie Guerrero for the custody of Dominick was just a fictional story line.
AAA & ECW:
Rey Misterio Jr. (changed to Mysterio when he entered the WWE) spent much of his early career in the AAA promotion in Mexico. He garnered some attention by North American promoters when he appeared on their When Worlds Collide PPV. In 1995, he wrestled in ECW. His matches against Psicosis and Juventud Guerrera brought the house down. He was signed by WCW in 1996.
Rey's most famous moment in WCW occurred in 1996 when he was lawn darted into the side of a trailer by Kevin Nash. His career recovered nicely and he became a mainstay in the cruiserweight title scene. He had many great matches against both luchadores and cruiserweights alike. His most famous match of this era was a title vs mask match against Eddie Guerrero at Halloween Havoc 1997. In 1998, he lost a match and was forced to join the Latino World Order.
No Mask, Giant Killer, & No Limit Soldier :
At Super Brawl 99, Rey lost a tag team match to Scott Hall and Kevin Nash and was forced to unmask. The new Mysterio became a giant killer and quickly gained wins against the giants of the territory including Kevin Nash, Scott Norton & Bam Bam Bigelow. Later in the year he formed a successful tag team with Billy Kidman and eventually joined Master P's No Limit Soldiers.
The Filthy Animals:
After Master P left WCW, Rey formed the Filthy Animals with Konan and Eddie Guerrero. Billy Kidman and Juventud Guerrera joined the group soon afterwards. In 2000, they joined the New Blood and later feuded with the Misfits in Action and Team Canada. At the final WCW Nitro, Kidman & Misterio won the recently created cruiserweight tag team championship. After WCW shut down, Rey was off national TV for over a year.
Rey made his WWE debut in the summer of 2002. He was back to wearing his mask and the WWE blurs out all old footage that shows his face. His first feud was with Kurt Angle. In early 2003, he was injured by the Big Show when he was swung, while attached to a stretcher, into a ring post. When Rey returned to action he briefly held the cruiserweight title and then reformed his tag team with Billy Kidman. Most of 2004 saw him battle for the cruiserweight title.
Eddie Guerrero & Rey Mysterio:
In 2005, Eddie & Rey won the tag team titles. Eddie was jealous of the fact that he never beat Rey and turned on his partner. He held a secret over Rey's head which turned out to be that Dominick was really adopted and Eddie wanted his son back. Rey won a ladder match to retain the custody of his son. Since Eddie's tragic death, Rey has been dedicating his matches to his fallen friend.
The Greatest Underdog Story Ever:
Rey Mysterio's WCW & WWE Title Victory History:
7/25/11 RAW - beat The Miz in the tournament final for the vacant championship
World Heavyweight Championship
4/2/06 WrestleMania 22 - beat Champ Kurt Angle & Randy Orton
6/20/10 Fatal 4 Way - beat Champion Jack Swagger, Big Show, and CM Punk
WWE Intercontinental Championship
4/5/09 25th Anniversary of WrestleMania - beat JBL
6/29/09 The Bash - beat Chris Jericho in a title vs. mask match
WWE Tag Team Title
1/7/02 - with Edge beat Kurt Angle & Chris Benoit
12/9/04 - with Rob Van Dam beat Rene Dupree & Kenzo Suzuki
2/20/05 No Way Out - with Eddie Guerrero beat The Basham Brothers
12/16/05 - with Batista beat MNM
WWE Cruiserweight Title
6/5/03 - Matt Hardy
1/1/04 - Tajiri
6/17/04 - Classic Chavo
WCW Cruiserweight Title
7/8/96 - Dean Malenko
10/26/97 Halloween Havoc - Eddie Guerrero
1/15/98 - Juventud Guerrera
3/15/99 - Billy Kidman
4/26/99 - Psicosis
WCW Tag Team Titles
3/29/99 - with Billy Kidman beat Chris Benoit & Dean Malenko
10/18/99 - with Konan beat Harlem Heat
8/14/00 - with Juventud Guerrera beat The Great Muta & Vampiro
WCW Cruiserweight Tag Team Titles
3/26/01 - with Billy Kidman beat Kid Romeo & Elix Skipper
(Sources: PWI Almanac, Onlineworldofwrestling.com, reymysterio.com)