To fans, mixed martial artist Ronda Rousey will always be the Baddest Woman on the Planet. But the trailblazing athlete, who was inducted into the Ultimate Fighting Championship Hall of Fame in 2018, hasn't competed professionally since 2016 and expressed no desire to be back at it. Then that changed. On May 16 at L.A.'s Intuit Dome, Rousey, 39, will step back into the octagon (streaming live on Netflix, 9 p.m. ET) against fellow retired legend Gina Carano.