In a sport in which rematches are commonplace, the trilogy is a rare and heralded compilation.
Over the years, we've been treated to thrice helpings of Chuck Liddell vs. Randy Couture, Quinton "Rampage" Jackson vs. Wanderlei Silva, and Georges St-Pierre vs. Matt Hughes (to name a few) with each born out of necessity and demand.
We will soon add the names of Frankie Edgar and Gray Maynard to the list when they headline UFC 136 on Oct. 8 at Houston's Toyota Center.