On-Deck Batter Interference

[brandda]

Not sure about OBR, but using LL rules, I would call it like this:

Assuming that there was no intent on the part of the on deck to keep the pitcher from fielding the ball, and his actions did not materially impact the play, I would rule this the same way as if there had been spectator interference. Dead ball, no one is out and runners who had not reached base prior to the interference return to their base of origin.

If you judge that there was intent by the on deck to interfere do whatever you need to do to remove any advantage gained. This still means that the runner gets sent back, but unless the batter or the runner was the cause of the interference no one is out. Bsed on what I have read below, the OBR rule may be different, but that would be my call.