NFHS D3K rule clarification

[Manny A]

Originally Posted by chapmaja

Where we have an issue is if the batter takes off on D2K, and the catcher throws to first to retire this runner and a runner from 2nd or 3rd successfully advances on the play, as a result of the throw going to first base, then we have interference by the batter, that batter would be out and the runners would go back to the base occupied at the time of the pitch.

Where is the interference?

The simple fact is, there is none. The batter did not prevent the defense from making any plays on anyone. This is nothing more than a DMC because she threw the ball when she should have known she didn't have to.

This has been discussed ad nauseum. When a batter/retired batter runs to first base when she shouldn't, the only way you have interference if the catcher throws to first is if she's making a pickoff play on the runner at first base diving back, and the ball hits the batter/retired batter.