Professional Fighters League (formerly the World Series of Fighting, "WSOF") is an American mixed martial arts promotion, and the following is a history of its champions in each weight class. As well as championship history for their International promotions WSOF: Canada and WSOF Global Championship.
1. def. Derrick Mehmen at WSOF 24 on Oct 17, 2015
2. def. Josh Copeland at WSOF 31 on Jun 17, 2016
3. def. Shawn Jordan at WSOF 35 on March 18, 2017
1. def. Yushin Okami at WSOF 15 on Nov 15, 2014
2. def. Clifford Starks at WSOF 30 on Apr 2, 2016
3. def. Louis Taylor at WSOF 34 on Dec 31, 2016
1. def. Jon Fitch at WSOF 16 on Dec 13, 2014
2. def. Jake Shields at WSOF 22 on Aug 1, 2015
1. def. Jake Shields at WSOF 34 on Dec 31, 2016
2. def. Brian Foster at PFL 1 on June 30, 2017