UFC superstar Jon Jones just announced he's officially vacating his light heavyweight title -- and suggested he's done fighting. Forever.
"Just got off the phone with UFC," Jones said ... "Today I confirm that I’m vacating the light heavyweight championship. It’s officially up for grabs."
"It’s been an amazing journey, sincere thank you to all my competition, Ufc and most importantly you fans."
Jones says the UFC made it clear there was "no negotiating" moving forward -- so he's just going to hang it up instead.
"If that ever changes, I’d love to come back and compete again as a heavyweight.