Former International Boxing Federation light heavyweight champion William “KO King” Guthrie (33-3-1, 26 KOs) takes a major step up in his comeback bid July 29 against Luke Munsen (19-5, 13 KOs), in a 12-round title fight for the vacant IBF International Cruiserweight Title, on the “Hold Nothing Back!” pay-per-view show at Qwest Arena in Boise, Idaho. [details]