MABL and MSBL (adult hardball leagues) both have this rule...
their website is:
http://www.msblnational.com/main.asp...n=doc&doc_id=4
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rule 3.h
3.h All teams must announce offensive additions, substitutions, and/or changes to the home plate umpire AND opposing team manager and/or scorekeeper. Only after this has been done will the added player be deemed a legal substitution.
If a team fails to announce an offensive addition/change, the player will be called out as soon as he occupies the batterÂ’s box and the lineup will revert back to the lineup in effect prior to the player entering the game. The unannounced player will not have officially entered the offensive lineup and is therefore still available offensively even though an out has been assessed.
Example: Team A is batting 12 players and wishes to add a player to the bottom of the lineup (Player 13). Player 13 walks to the plate and is not announced to either the opposing team or home plate umpire. Once this player occupies his position in the batterÂ’s box, the umpire will immediately call him out for an illegal substitution and it will then go back to the number 1 position in the lineup. Player 13 is still available to be added to the lineup legally.
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Sometimes I think this is Calvinball and not baseball.
