- Jun 22, 2008
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It's covered in either the case plays or the plays and clarifications.
Doesn't need an interpretation, it is in the rules. The pitcher and catcher may use a courtesy runner. If the pitcher or catcher (at the time of the last out of the previous half inning) is the last player due up and to be placed at 2nd, that pitcher or catcher is permitted to use a courtesy runner like any other inning.