The New York Mets, a multibillion-dollar corporation that moonlights as a comedy act, put on their finest show in years Monday. Rampant speculation about the job security of their embattled manager amid a sweep by baseball's worst team was merely the opening set. Then their first-year general manager announced that Yoenis Cespedes, their highest-paid player who already was on the injured list, had broken his ankle when he stepped in a hole at his ranch, and it was as though Heisenberg had cooked up this batch of news, because it was pure Mets, blue to the core.