See a complete list of (WSOF) World Series of Fighting title holders for each weight division.
- World Series of Fighting (WSOF) was formed in 2012.
- The WSOF uses a ten-sided (Decagon) cage for their events.
- Lance Palmer successfully defended his Featherweight title for the first time at WSOF 21.
World Series of Fighting Champions:
|Blagoy Ivanov||Heavyweight||250lb (113 kg)||Bulgaria|
|David Branch||Light Heavyweight||205lb (93 kg)||USA|
|David Branch||Middleweight||185lb (84 kg)||USA|
|Jon Fitch||Welterweight||170lb (77 kg)||USA|
|Justin Gaethje||Lightweight||155lb (70 kg)||USA|
|Lance Palmer||Featherweight||145lb (66 kg)||USA|
|Marlon Moraes||Bantamweight||135lb (61 kg)||Brazil|
|Magomed Bibulatov||Flyweight||125lb (57 kg)||Russia|
|N/A||Women’s Strawweight||125lb (52 kg)|