And yet even still... some players and staff are apparently this highly contagious disease. Maybe not from each other, maybe not at their workplace. That's for the contact tracers to figure out.
I cannot help extrapolating to schools where...
* students do NOT prioritize their health / safety or that of others
* admins and political leaders have competing interests and limited budgets
* teachers keep getting encouraged to work *closer* to students in the buildings, and even 6 feet apart is a stretch (there is no outfield, or even a dugout)