MIAMI — The smugglers who helped Los Angeles Dodgers star Yasiel Puig leave Cuba on a speedboat have made death threats against him and against a Cuban boxer who says he defected with Puig, according to court documents. The documents are part of a federal lawsuit in Miami and describe a dangerous odyssey of shady characters, unpaid smuggling debts and threats of violence that have followed Puig since he left Cuba by boat in June 2012. The tale is based almost entirely on the account of the boxer, Yunior …