ST. LOUIS, Mo. – Guillermo Jones has withdrawn from his scheduled IBF cruiserweight world title fight with Steve Cunningham on Saturday night due to medical reasons, it was announced today by promoter Don King. The main event, an IBF junior middleweight championship bout between current 154-pound champion Roman Karmazin and former world welterweight titlist Cory Spinks, will be the only televised bout airing live on SHOWTIME at 10 p.m. ET/PT,. [details]