Fed pitching question

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Originally Posted by HugoTafurst

I think I first became aware of this ruling 2 years ago and I don't quite understand the part about ruling the runner out for leaving early.
My thinking has been that there are many illegal pitches which can actually cause (if that is the correct word) the runner to leave early.

Don't runners time their leaving a base to the pitcher?
Isn't it reasonable to think that it is this illegal infraction could be the cqause of the runner leaving early?

Just wondering if I'm way off base on this one?

I know the case ruling, just seems funny to me.

Only IP's that would cause an issue with the runners timing would be the leap and crow hop as the pitch would not be released as quick as would be from the push-off than what would of happened in a legal pitch.