Will, good question. Not sure of the answer but I have seen this before and no call was made. I think this would come under the ruling of offensive interference. I think...if in the opinion of the umpire, the batter did NOT interfere with the catcher in his attempt to make a play, I don't think there is a violation. However, if the base runners are attempting to advance, the umpire should call offensive interference and the baserunners would have to return to their bases and the batter would be called out for offensive interference.
Fungo
Did this happen and if so, what was the call?