The violence simply couldn't wait for Saturday night -- the Jake Paul vs. Nate Diaz press conference ended in an all-out brawl involving both fighters' security ... with multiple punches thrown.
The chaos went down minutes ago in Dallas ... shortly after Jake and Nate jawed back and forth in their last media event prior to their big fight at the American Airlines Center.
Something happened on stage as Nate and Jake faced off ... and a huge scuffle ensued.
It appears Nate was exchanging words with Jake's manager, Nakisa Bidarian .