Jung Chan-sung (born March 17, 1987), better known by his ring name The Korean Zombie, is a South Korean professional mixed martial artist and kickboxer. He currently competes in the Featherweight division of the Ultimate Fighting Championship (UFC). A professional competitor since 2007, Jung formerly fought for the WEC, Pancrase, World Victory Road, and DEEP. His nickname, The Korean Zombie, comes from his zombie-like ability to continue to move forward and fight aggressively, even after taking heavy blows.As of April 12, 2022, he is #5 in the UFC featherweight rankings.