Source/PR -Photo Credit: Courtesy – (AUG 6) QUINCY, Mass. – Former New England welterweight champion Derek “The Surgeon” Silveira defeated former world title challenger Michael “Cold Blood” Clark last night (Sat., Aug. 5) in the “Fight Night at the Bay” main event, presented by Granite Chin Promotions, at Marina Bay Sportplex in Quincy, Massachusetts. Silveira (12-1,