Daniel Cormier should NOT hang up the gloves just yet ... not before seeking vengeance in a trilogy fight against Jon Jones ... so says former UFC star Jimi Manuwa.
Earlier this week TMZ Sports talked to Jimi -- a former UFC light heavyweight bad ass who beat dudes like Ovince St. Preux, Corey Anderson, and Jan Blachowicz -- about DC's future in MMA.
Manuwa says DC isn't done and deserves another big time fight .