The following is a timeline for Rey Mysterio's ECW, WCW and WWE career. Listed is every PPV match (excluding battle royals in which he was not involved in the ending) and title change that was involved in. In the case of ECW, all of his matches that took place at either the ECW Arena or Lost Battalion Hall are listed. Bolded items represent title victories while italicized items represent title losses.

1994
11/6 AAA When Worlds Collide – w/Heavy Metal & Latin Lover lost to Fuerza Guerrera, Psicosis, and Madonna’s Lover

1995
9/19 ECW Gangsta’s Paradise – beat Psicosis
10/7 ECW – lost to Psicosis in a best of 3 falls match
10/28 ECW– w/Konnan beat Psicosis & La Parka via count out
11/18 ECW November to Remember – beat Psicosis in a Mexican Death match

1996
1/5 ECW House Party – w/911 beat the Eliminators
2/3 ECW (Lost Battalion Hall) – beat Juventud Guerrera
3/8 ECW Big Ass Extreme Bash (LBH) – lost a best of 3 falls match to Juventud Guerrera
3/9 ECW Big Ass Extreme Bash – beat Juventud Guerrera in a best of 3 falls match

WCW

1996
6/16 Great American Bash – lost to Cruiserweight Champion Dean Malenko
7/7 Bash at the Beach – beat Psicosis
7/8 – Won the Cruiserweight title from Dean Malenko
8/10 Hog Wild – beat Ultimo Dragon
8/15 Clash of Champions - beat Dean Malenko
9/15 Fall Brawl - beat Super Calo
10/27 Halloween Havoc – lost cruiserweight title to Dean Malenko
11/24 World War 3 – lost to Ultimo Dragon
12/29 Starrcade – lost to Jushin Liger

1997
2/23 SuperBrawl – lost to TV Champ Prince Iakea
4/6 Spring Stampede – beat Ultimo Dragon
5/18 Slamboree – beat Yuji Yasuraoka
8/9 Road Wild – lost to Konan in a Mexican Death Match
10/26 Halloween Havoc – beat Eddie Guerrero for the Cruiserweight title. Rey’s mask was on the line
11/10 - lost cruiserweight title to Eddie Guerrero
11/23 World War 3 – lost to cruiserweight champ Eddie Guerrero

1998
1/15 – won cruiserweight title from Juventud Guerrera
1/24 Souled Out – lost cruiserweight title to Chris Jericho
7/12 Bash at the Beach – beat Chris Jericho to win Cruiserweight title
7/13 – lost cruiserweight title to Chris Jericho
8/8 Road Wild – beat Psicosis
12/27 Starrcade – lost to cruiserweight champion Billy Kidman & Juventud Guerrera

1999
1/17 Souled Out - lost to Cruiserweight Champion Billy Kidman, Psicosis & Juventud Guerrera
2/21 Superbrawl – Lost the match and his mask in a tag team match with Konnan against Scott Hall and Kevin Nash
3/14 Uncensored – lost to Kevin Nash
3/15 – won the cruiserweight title from Billy Kidman
3/29 – w/Billy Kidman won the WCW tag team titles from Chris Benoit & Dean Malenko
4/11 Spring Stampede - beat Billy Kidman
4/19 – lost the cruiserweight title to Psicosis
4/26 – won the cruiserweight title from Psicosis
5/9 Slamboree – Three Way match for WCW Tag Team Titles: Raven & Perry Saturn beat champs Billy Kidman & Rey Mysterio Jr. and Chris Benoit & Dean Malenko to win the titles
6/13 Great American Bash – w/Konan beat Curt Hennig & Bobby Duncam Jr.
7/11 Bash at the Beach - Elimination Match: Rey Mysterio Jr., Konnan, Swoll, & Brad Armstrong beat Barry Windham, Kendall Windham, Curt Hennig, & Bobby Duncam Jr.
8/14 Road Wild – w/Eddie Guerrero & Billy Kidman beat the Insane Clown Posse & Vampiro
8/19 – lost cruiserweight title to Lenny Lane
9/12 Fall Brawl - with Eddie Guerrero & Billy Kidman beat the Insane Clown Posse & Vampiro
10/18 – w/Konnan beat Harlem Heat for WCW tag team titles
10/24 – w/Konnan lost WCW tag team titles to Harlem Heat

2000
8/14 – w/Juventud Guerrera won the WCW tag titles from the Great Muta & Vampiro
9/17 Fall Brawl - The Natural Born Thrillers & Filthy Animals fought to a no contest when Paul Orndorff suffered a legitimate injury
9/23 – w/Juventud Guerrera lost the WCW tag team titles to Mark Jindrack & Sean O’Haire
10/29 Halloween Havoc - Three Way match for WCW Tag Titles: Champs Mark Jindrak & Sean O'Haire beat Rey Mysterio & Billy Kidman and Boogie Nights
11/26 Mayhem – with Billy Kidman beat Kronik & Alex Wright in a handicap match
12/17 Starrcade – with Billy Kidman & Konnan lost a street fight to Jeff Jarrett & The Harris Boys

2001
1/14 SIN – with Billy Kidman & Konnan lost a penalty box match to Lance Storm, Mike Awesome, & Elix Skipper
2/18 Superbrawl – lost to cruiserweight champ Chavo Guerrero Jr.
3/18 Greed – w/Billy Kidman lost cruiserweight tag team tourney finals to Kid Romeo & Elix Skipper
3/26 Final Nitro – w/Billy Kidman won the cruiserweight tag team titles from Kid Romeo & Elix Skipper
3/26 – WCW went out of business

Rey's WWE Career is on the following page