Via TMZ Sports:

Guillard was working for the Ginn Mill in Denver back on June 15, 2018 … when a scuffle broke out inside of the bar.

You can see in the video, bouncers wrestle with a man to get him outside … when suddenly, another male approaches the commotion.

That’s when Guillard goes after the guy, pushing him back with one arm … before socking the dude straight in the jaw.

MMA fighters can’t seem to stop fighting in the streets.  Maybe it’s time to start paying them some real cash so it only makes sense for them to throw hands in the cage.

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