I expect MLB to delay the start of the season. The Mariners had already moved their home games.
Can you imagine running the injured reserve list, and bringing AAA and AA players up for 40 games because too many of the major league guys are on quarantine? You could be watching a season where it’s common to have 25 to 15 on the box-score. Even for the umpires....where are you going to find people to fill the requirements to fill in?