1990's Barcelona Dragons World League Of American Football Game Used HelmetBarcelona Dragons game used helmet circa early 1990s. Dragons were a team in the NFL Europe League, which functioned as a developmental minor league of the NFL from 1989 (as the World League of American Football) to 2007. Sticker with number 23 is affixed to the helmet on the inside of the right ear, which could indicate the player Their home field in Barcelona was the Estadi Olmpic de Montjuic, the 1992 Olympic Stadium, and later the Mini Estadi Size