Back to the OP.
In Major League Baseball, each league has a plan to restock with players if a team is catastrophiclly hit with injuries/deaths.
The American League has (or maybe had, see below) a plan as follows:
If at least five players were “totally disabled or worse” as a result of an accident, a replacement draft would be held. Each of the other teams would have to submit a list to the commissioner’s office of four players who will be eligible to be drafted. These players must have been on the major league roster on the date of the accident. The team then gets to pick from those players until it replaces the players it lost.
The National League plan was slightly different. It required six players to be “disabled” and each team left three players unprotected.
Of course, now that the National and American Leagues are no longer seperate business entities, I don’t know the current status of these plans.