[tcannizzo]

Originally posted by IRISHMAFIA
Actually, there is no definition for an "illegal substitute". You either have an unreported substitute or an illegal player.

An US could be an IP. An IP cannot be an US, but in certain instances are treated in a similar fashon.

However, failure to report a substitute is a violation making the action illegal. Hence, the notation that B1 was an illegal substitute in common language, not softballese.

Besides, it was the closest thing to an intelligent option offered.

How can an umpire refer to an "Illegal Substitute" if no such designation appears in the entire text of the Official Rule?