It's official, Dustin Poirier has retired, and the UFC loses one of its most reliable all-action lightweight stars.

Dustin Poirier says going toe-to-toe with Max Holloway in the final seconds of their UFC 318 fight didn't go to plan.

Dustin Poirier chose caution over chaos at UFC 318, opting to clinch instead of brawl with Max Holloway in the final moments ...