reading about all these postponements.. how often do they test and how quickly do they get results?
That is.. have they played games where some of the players had CoVid and did not know it?
Is it safe enough to play with a player who has CoVid? hmmm.. I suppose the ball is a possible problem. Pitcher wets his fingers (in cold weather blows on his hand) .. pitches.. next thing the catcher or UMP have touched that same ball.. or it gets hit and some fielder touchers it.. the first base coach picks up a little dribbler and later touches his face sending signals. Batters may spit into their hands for grip (or do they all use gloves now?) .... bat boys pick up the bat. Its a mess.
MLB tried to address some of these, such as allowing pitchers to carry a wet rag instead of licking their fingers.
https://www.mlb.com/amp/news/mlb-announces-new-features-for-2020-season.html