The danger in this virus is, in large part, about how it can spread quickly and overwhelm our healthcare system. A 60,000 person crowd? One person could infect a fuckton of people there. A couple hundred guys at a football game? Much lower risk. If one gets it, theyre A) not going to spread it to many, and B) generally in the lowest of risk groups, and C) easier to test that relatively small number regularly and isolate any who turn up positive (you'll never test all 60,000 people entering JTS on a saturday morning, obviously)
Most football coaches fall in the high risk group.