INGLEWOOD, California, May 17 : Former UFC champion Ronda Rousey came roaring out of the traps in her first mixed martial arts fight in almost a decade, securing her trademark armbar submission in the opening seconds to defeat Gina Carano on Saturday night. The 39-year-old, an Olympic bronze medallist in judo in 2008, wasted no time when the fight began at the Intuit Dome in the first MMA card staged by Jake Paul's Most Valuable Promotions. She took down the 44-year-old Carano, quickly moving