Unfortunately, I think that you can make a case for both arguments: calling a blocked ball or letting it play out. ASA does not make it clear who is "engaged in the game" and who is not. In that sense, rwest is correct in that, as it is written, the reader should simply understand who is and isn't engaged. It's much like a force out - everyone seems to understand what it is, but good luck in correctly putting it down on paper.
I've already offered my two cents on this in a previous thread
here.
Since this question was about NFHS rules, I'll simply stop there.