UFC officials have confirmed that a trilogy match up between lightweights Gray Maynard and Nate Diaz will take place at The Ultimate Fighter Season 18 Finale.
— UFC (@ufc) September 8, 2013
Each of them holds a victory over the other. Diaz won their first pairing, submitting Maynard in the semifinals of TUF 5. Maynard bounced back at UFC Fight Night 20, winning the fight with a controversial split decision.
While both of them have had a fairly rocky career since then, they are still highly ranked in the lightweight division. Maynard is currently ranked at #4, while Diaz clocks in at #7. A win here for either of them could put them on track for an eventual title shot.
The TUF Finale event is set to take place on November 30. It will air live on FOX Sports 1.