WNBA star Candace Parker announced her retirement Sunday after a record-setting, 16-year professional career in which she became the only player to win Rookie of the Year and league MVP in the same season. The three-time league champion and two-time Olympic gold medalist revealed her decision in a post on Instagram, the Associated Press reported. “The competitor in me always wants 1 more, but it’s time,” Parker, 38, wrote. “My HEART & body knew, but I needed to give my mind time to accept it.” The move came after Parker, who’s undergone ten surgeries during her career, told AP in November that…