Situation: Runner on 1st, or runner on 1st or 2nd (in either case, 3rd base is empty).
Right-handed pitcher's movement: From set position in stretch, pitcher steps with left foot (lead foot) directly towards an empty third base and right foot (pivot foot) follows to position off rubber. No throw is faked toward third. Now pitcher immediately turns to either throw or fake a throw to either 1st or 2nd.
Is this legally leaving the rubber to become an infielder, or is this a balk?
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