For the most part, this list is comprised of younger fighters that have the potential to develop into UFC champions. That's because I've weighted the likelihood of a fighter winning a title 10 years from now in equal measure to the likelihood of their winning one tomorrow.
Additionally, fighters on the precipice of competing for a UFC title have been given the right of way over those farther removed from the opportunity.
Consequently, perennial contenders like Chael Sonnen and Jon Fitch have not been included. Not because they aren't serious title threats, but because they have less opportunity than some of the younger guys I've given preference to.
That isn't to say no veterans have found their way onto the list. On the contrary, you'll see some faces very much indigenous to the UFC title scene.
The only strict rules I've put in place are that no current or former UFC champions are eligible, and only fighters currently in the UFC were considered.
For each inclusion I've classified the likelihood of attaining UFC gold by including a "Very High," "High," "Moderate," "Low" or "Very Low" rating. "Very High" express greater probability than "Very Low."
Now that we're through all the rules and such, on to the list!