Case Book 2011, Page 91.
CR 9 SITUATION: F1 singles and is replaced at first by a courtesy runner. On the next pitch, the courtesy runner steals second base and sprains his ankle, but is safe on the slide. Does F1 have to replace the courtesy runner? RULING: No. Any legal substitute may become the courtesy runner. In this case, if no legal substitute is available, F1 shall return to run.
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