Sounds like Nate Diaz is already training for his Conor McGregor rematch.

That includes full-contact sparring with bloated Ultimate Fighter (TUF) washout Jason Guida, on the scene at UFC 199 last weekend to corner his featherweight brother Clay Guida. "The Carpenter," it should be noted, was able to mug-and-slug his way to victory over Diaz way back at UFC 94.

Evan Rodner, producer of Brendan Schaub and Bryan Callen's "Fighter and the Kid" podcast, talks to MMAmad.com:

"It looked like Nate Diaz got into an altercation with Jason Guida, Clay Guida's older brother. I have no idea what it was over, but all of a sudden there were a ton of bodies entering the tunnels in the back. After the scuffle had ended, Diaz walked back into the arena as though nothing had happened. He didn't give one single fuck."

Color him slap happy.

The Guida melee was subsequently reported by UFC welterweight Nicolas Dalby, who was backstage at UFC 199:

So, @DalbyMMA says a fight broke out between Diaz and Guida's teams. ...I'm not surprised. pic.twitter.com/Bbmw9c4i3z — MiddleEasy (@MiddleEasy) June 5, 2016

Diaz getting into a brawl outside the Octagon? I'm not surprised, motherfuckers.