Notable Fighters: Cain Velasquez, Frankie Edgar, Dominick Cruz, Rashad Evans, Jon Fitch
Major Promotions: Ultimate Fighting Championship, Strikeforce, Bellator Fighting Championships
Full disclosure: the writer of this article is an American. But it cannot be disputed that the United States produces the most top MMA talent of any country in the world. A look at any collection of Top 10 in the World lists will likely see a majority of the slots occupied by American fighters.
This shouldn't be a surprise. America has the third largest population in the world. It is also home to the largest mixed martial arts promotion, the UFC, and is home to other prominent promotions as well like Strikeforce and Bellator. In traditional martial arts competition at the Olympic level, the US has the third most medals in Taekwondo, the most in Freestyle Wrestling, and the most in Boxing. There is clearly a large base of talent upon which to draw for American mixed martial arts.
There are obviously dozens of world-class MMA fighters from the United States. Current American UFC champions include Heavyweight Champion Cain Velasquez, Lightweight Champion Frankie Edgar, Bantamweight Champion Dominick Cruz. Meanwhile Rashad Evans is a top contender for the light heavyweight title, as is Jon Fitch for the welterweight championship.
With American organization UFC extending overseas two things are guaranteed: Americans will continue to compete at the top-levels of MMA across the world, but will also be met with an ever-growing base of competitors from nations all over the globe.