Yeah hopefully those they live with take the necessary precautions as well to avoid any major spread for the players and their teammates
Agree.
If no one in their family has caught it, then they need to keep doing what they're doing (assuming of course they've been taking precautions and it's not just blind luck lol).
Family buying in and continuing to take precautions will be just as and maybe more important than when they were sitting at home.
When they're with the team they'll be following MLB protocols. But MLB can't control what the family does.