This is where I got lost on my original call. I interpreted Home Plate as a Base, and therefore it was legal for F1 to 'throw' there to make a play. in my OP, (OBR by the way), F1 stepped toward home/base (actually was toward right batter box as the catcher was standing there.)and threw. I didn't even consider CI, since batter had vacated the box. No matter what, I learned a lot on this one. THANKS Home is a base in OBR. I think throws home from the rubber are legal under 8.01, but this particular instance is not under 7.07 like Semper_Fi pointed out.