As the premiere brand in mixed martial arts, the UFC is the home to the best fighters in the world. With very few exceptions, their roster has the absolute top talent in the sport and its depth is absolutely unmatched.
However, they don’t always have all of the top talent.
Every now and then they’ll find themselves in a position where a competing promotion finds a fighter and grooms him or her into something special, and it’s eventually up to the UFC to go out and acquire that fighter in free agency.
Oftentimes, it works out nicely.