Perhaps I should attempt further clarification. We've all seen the lefty, who, after coming to a set position, raises the forward leg (non pivot foot) straight up in the air and his arms are in motion upward. I believe that what constitutes commited to pitch, is if any motion towards the plate/batter is present, then, presumably, if he then attempts a pick-off he has committed a balk. The question is what defines the point in his motion when he can no longer throw to or fient at a base without balking?
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