Have saddle, will travel--a well-worn aphorism. But is it a wise one to emulate in this time of the coronavirus? Within the past week, Flavien Prat, Victor Espinoza, Eduard Rojas Fernandez, Luis Saez and Martin Garcia have all tested positive for the virus--a chain of events that can be traced back to Los Alamitos over the July 4 weekend, said Derek Lawson, Prat's agent. "There's no question that that's where it happened," he said, of Prat's infection occurring at the Southern California facility. But against a broader surge in coronavirus...