The first WWE wrestler to wrestle as the El Gran Luchadore was Paul London on April 22, 2004, in a singles match against John "Bradshaw" Layfield.
El Gran Luchadore was presented by SmackDown General Manager Paul Heyman as the Mexican Heavyweight Champion, but the match was a squash where JBL won.
During the match, the former WWE Champion Eddie Guerrero interfered and allowed El Gran Luchadore to defeat JBL.
The next and final appearance of El Gran Luchadore on July 15, 2004, edition of SmackDown!.
After the match, Guerrero pulled the mask off of him, and revealing him to be SmackDown!