A Great Prime: Great MMA fighters tend to be able to point to what amounts to an amazing prime. In deciding who made this list, we rated the primes of each fighter (their best years).
Longevity: Top MMA competitors tend to have longevity. And they don't just fight for a long time; rather, they fight WELL for an extended period.
Intangibles/Extras: Greatness is sometimes defined by special accomplishments, characteristics, or gifts given to the sport which fall outside of the aforementioned two criteria. Most great MMA fighters possess something unique that sets them apart.
So without further ado, check out our Top 15 MMA Fighters of All Time list here (this list will be periodically updated).