World Series of Fighting, also known as WSOF, is an American mixed martial arts (MMA) promotion based in Las Vegas, Nevada. The inaugural WSOF event took place on November 3, 2012 and the main card was broadcast on the NBC Sports Network.

World Series of Fighting 6, was held October 26, 2013 in Coral Gables, Florida, USA. WSOF 6 featured the first WSOF Championship bout between Josh Burkman and Steve Carl.