After 6.5 years away, Nick Diaz is about to make his return to the Octagon, taking on Robbie Lawler ... but Dana White admits he doesn't know if the star from Stockton will fight again after UFC 265.
TMZ Sports talked to the UFC prez on Wednesday, days before Diaz is scheduled to fight for the first time since January 2015 (a no contest vs. Anderson Silva) ... and we asked if the comeback meant Diaz was back now as a full-time fighter.