Exactly, mick.
boldfacesun, the call of "infield fly - batter out" does nothing with respect to how the runners should treat the fly ball. All it does is remove the force in the event the fly ball is not caught, so the runners are not forced to advance into a dead-duck double play.
The runners still have to tag up to advance if the ball is caught, and are still in jeopardy of being out on a live ball appeal if they do not tag up, just like any other fly ball.
The infield fly rule does not protect the runner from the appeal for leaving early on the caught fly ball.
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Tom
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