Several sources have told the Daily News that at least twice during the past year, illegal bookmakers have emerged to pressure Paul Lo Duca into paying gambling debts. The first incident was in June 2005 when a man called the Florida Marlins to tell them Lo Duca, then with the team, owed him money, which was immediately reported to Major League Baseball, several sources familiar with the incident have said. The Marlins referred all questions about Lo Duca to Major League Baseball.