Back وورلد إكستريم كايج فايتينج Arabic World Extreme Cagefighting Catalan World Extreme Cagefighting German World Extreme Cagefighting English World Extreme Cagefighting Spanish World Extreme Cagefighting Finnish World Extreme Cagefighting French World Extreme Cagefighting IO World Extreme Cagefighting Italian World Extreme Cagefighting Japanese
World Extreme Cagefighting (WEC) var en amerikansk Mixed martial arts-organisation der var aktiv fra 2001 til 2010. I begyndelsen af 2011 fusionerede organisationen sammen med Ultimate Fighting Championship (UFC).