Yeah, who do NBA players even see on a regular basis? The girl they fuck in each city, few team employees, trainer, teammates, family...That's probably it during season.
These are among the most secluded people in society.
It could take up to 14 days before everyone they have come in contact with could show positive, which is why you see everything shutting down. So if in 14 days it's still 2 our 58 you have successfully slowed the spread and kept from overloading the hospitals and clinics for those that really are sick.