“It was in the off-season, out on the baseball field, that some residents noticed a change. Base-stealers were lethargic. Pitchers were losing their aim. In the evening, outfielders were burning up as if standing under the scorching sun of the day.” Over the past decade, more than 20,000 people in Central America regions — where workers spend long days cutting sugar cane — have died from a kidney disease that’s so poorly understood, it doesn’t even have a name.