#2. Gegard Mousasi
With one of the most decorated records in MMA history, if not the most decorated, Gegard Mousasi is one of the best talents that the UFC let go. Following an odd but valid victory over former champion Chris Weidman, 'The Dreamcatcher' parted ways with the world leader in MMA.
Mousasi was very candid in his disdain for the lack of promotion and opportunity the Ultimate Fighting Championship gave him. Many variables snowballed and pushed him to try his hand at other organizations. This is what birthed an incredible career in Bellator.
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Since signing with Bellator, Mousasi has gone 7-1. He's allowed to have sponsors, an opportunity that the UFC's deal with Reebok snuffed out for fighters, he makes more money and he seems to be very happy working for the company.
#1. Ronda Rousey
One of the biggest stars in MMA history is Ronda Rousey. The former Olympian and bantamweight champion of the UFC is a true pioneer and has made great strides for women in sports, let alone in MMA.
Unfortunately for 'Rowdy', her 12-0 record met an abrupt halt at the hands and legs of Holly Holm. A subsequent loss to the greatest female fighter to compete, Amanda Nunes, put the nail in the coffin of Rousey's illustrious career as an MMA fighter.
Following her MMA career, Rousey has gone on to do many great things. Becoming a professional wrestling superstar and a mother are some of the heavy highlights of her post-fight career.