> They're not doing enforcement out of nowhere because everyone knows that everyone is doing it, and it'd lead to the league enforcing against all teams simulta

> They're not doing enforcement out of nowhere because everyone knows that everyone is doing it, and it'd lead to the league enforcing against all teams simultaneously, which ultimately would be bad for the league itself to have at the very least none of it's star pitchers for some time period. Why? All you have to do is apply the rules at the end of a season, so that it applies to everyone equally. You can mention they are going to be enforced beforehand. If it applies at the start of a new season, it is fair for everyone. Nobody got an unfair advantage. And if you inform those involved beforehand, everyone can prepare in whatever way is necessary. Soccer rules get updated like this all the time. For example, it would not surprise me if rules are going to be updated after Eriksen's accident (with regards to continuing playing the match), but such would not apply during the European Championship. You wouldn't do same with say VAR either.