WORLD CHAMPION BEIBUT SHUMENOV STOPS WILLIAM JOPPY IN SIX SHYMKENT, Kazakhstan – WBA/IBA Light Heavyweight Champion Beibut Shumenov (11-1, 7 KOs) successfully defended his world titles for the second time, stopping  3-time world champion William Joppy in the sixth round, tonight in front of a packed house at the Ice Mansion in Shymkent, Kazakhstan. Joppy…