Ronda Rousey absolutely DESTROYED her real-life husband, Travis Browne, in an underground fight club on Monday ... and it was all for an episode of the show, "9-1-1."
Ronda is a regular cast member on the FOX hit -- and this week Ronda's character, Lena, brought her firefighter coworker, Eddie, (played by Ryan Guzman) to a parking lot fight club to work out his anger issues.
But, Ronda wasn't a spectator, she was there to fight -- and her opponent is a giant, bearded tattooed man ... whose face you never really see.
But, when we slowed down the tape, it was obvious that dude is Browne -- a 6'7", 250-pound former UFC fighter!!!