29, Women’s MMA fighter
Ronda is now one of the most famous athletes in the world, but she almost gave up on her athletic career a few years ago. She was the first-American woman to win an Olympic-medal in judo at the Beijing Olympics in 2008, but then retired at the age of 21 to become a bartender and cocktail waitress.
Ronda became an MMA fighter in 2011 after some serious training, and went on to become the UFC’s highest paid fighter. She also polled as ESPN’s Best Female Athlete Ever.