Source/PR Photo credit: Stephanie Trapp/SHOWTIME – (AUG 6) In a dominating and emphatic performance, hometown favorite Claressa Shields captured the WBC and IBF Super Middleweight World Championships in just her fourth professional fight Friday night on ShoBox: The New Generation live on SHOWTIME at MGM Grand Detroit.  The 22-year-old Shields (4-0, 2 KOs) of Flint, Mich.