What would be the call here?

OK, this actually happened to my son last season in the ACC against NC State. Runners on first and second, my son at the plate. He swung at a pitch, and fouled it straight down, a little behind him. He stood there as the ball spun forward, and slowly made its way to fair territory.  Oops. 

The catcher, of course, picked it up and threw to second, and they turned an easy 2-6-3 DP. Very embarrassing, of course. But here is my question:

What if, seeing the ball spinning forward through the batters box toward fair territory, had he just kicked it or otherwise touched it? Would that be interference if the ball is in foul territory? 

He and I were laughing about the play the other day, and wondering about this. (I told him he's the only guy I ever saw be out at first by 15 feet on a 2-6-3 double play.) 

We didn't know the answer, but we agreed that even if it IS interference, it is preferable to a double play! 

As you can see by matt's response, the rule book, although difficultly written and poorly organized is pretty well complete in covering playing actions. If you can think of it, there is a rule to cover it....  

Thanks, guys. I figured there had to be a rule on this. It is interesting, however, the part about "intent break up a double play."  That, of course, has to be a judgement call. In the situation I describe, with a double play a possibility, would it automatically result in two outs being called?