A spokesperson for the Orleans Parish District Attorney's office confirmed to TMZ Sports on Monday afternoon that Diaz's second-degree battery charge has been dismissed. No further details surrounding the case's disposition, however, were given.

Diaz's rep, Zach Rosenfield, said in a statement that he was pleased with the decision ... reiterating yet again that he believes when Diaz choked out Rodney Petersen in the middle of the famed New Orleans street back in April, he was doing nothing more than defending himself.

"Since Rodney Peterson sought out to fight Nate on Bourbon Street, we have maintained Nate's actions were 100 percent in self-defense," Rosenfield stated.

"It was clear on the video, clear in pictures and clear from the multiple other videos Rodney posted before and after."

"Nate has a right to defend himself against those who want to make a name for themselves and did so," Rosenfield added.

"We appreciate the Orleans Parish District Attorney taking the time to review all aspects of this case and their decision to not proceed with it."

Diaz never seemed to be too bothered by the criminal case ... he actually joked about it all with Jake Paul in May -- laughing with the YouTuber/boxer at their pre-fight press conference.