Compiled by Earl Oliver and Robert Bihari
Defeated Black Magic to become the first champion
Won the title from Tinieblas Jr. in a Triangle Match with El Hijo Del Anibal
Tinieblas title at had the stake, Scorpio his hair and Anibal his mask.
10/12/2003-Naucalpan (Arena Naucalpan)
02/12/2004-Naucalpan (Arena Naucalpan)
Pinned Tinieblas, Jr. after a tag match where all parties had something on the line.
Villano and Tinieblas were partners with Villano's mask and Tinieblas' title on the line. Their opponents were Negro Casa and Scorpio, who were each defending their hair.
09/09/2004-Naucalpan (Arena Naucalpan)
05/12/2005-Naucalpan (Arena Naucalpan)
12.Scorpio, Jr. 
09/11/2005-Naucalpan (Arena Naucalpan)
Scorpio, Jr. jumped to AAA
05/05/2006-Neza (Arena Neza)
In a tag match, Canek/Rayo De Jalisco Jr. beat Perro Aguayo Jr./Head Hunter I. The winners then fought for the vacant belt with Canek crowning himself the 13th ever IWRG IC Heavyweight Champion.
14.Mascara 2000 Jr.
04/18/2010-Naucalpan, Estado de Mexico
Became new IWRG Heavyweight champion by defeating Canek (former champion), Scorpio Jr and Pirata Morgan in a four way match (Morgan and Scorpio Jr, put their hair on the line, Mascara his mask and Canek his championship).
15.Mascara Ano 2000, Jr.
04/18/2010-Naucalpan (Arena Naucalpan)
06/24/2010-Naucalpan (Arena Naucalpan)
Defeated King, La Parka, and Dr. Wagner Jr. in a 4-way match.
19.Head Hunter I
Defeated Taboo (c) and Electroshock in a 3-way match.
20.Cien Caras Jr.
Vampiro Canadiense retired.
22.El Hijo de Dos Caras
Defeated Demon Clown, Dr. Wagner Jr., LA Par-K, Mascara Sagrada, and Pirata Morgan in 6-way match.
23.Máscara Año 2000 Jr.
24.El Hijo de Dos Caras 
26.Máscara Año 2000 Jr. 
28.Trauma I 
29.Mr. Electro 
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