Official Rules(view all)

NFHS 8-4-1h, 8-4-2g

NFHS 8-4-1h, 8-4-2g/OBR 6.01a7

If a batter-runner intentionally interferes with a potential double play, he is out and so is the other runner who would most likely have been played against. If the umpire is not sure who would have been played against, the runner of furthest advance (closest to home) should be the second out.

[OBR: the second out in this situation is always the runner of furthest advance, no matter who they would have played against or where the play possibilities were.]