A look back at some of the fights in PFL history.

A look back at some of the fights in PFL history.

MMA star Justin Gaethje's biggest wins from the World Series of Fighting.

A monster-sized contender emerges in the heavyweight division when Renan Ferreira delivers one of the fastest KOs in PFL History.

Guillotine Choke is an iconic submission maneuver usually taught on day one at grappling academies. Don't let its simplicity fool you. Once your neck is trapped, it's only a matter of time before everything fades to black.