Scored Main Cap Bearing - Ouch

I lost something here.
You changed the oil pump when you changed the filter on a fresh engine? I am lost.
Is this the second oil pump on this build? If so why?
Bout 50 miles or so before the dropping of the pan this time round to do the rear main seal. Before he was just changing pan gaskets to no avail. He had a leak, that's what started this. Or at least how I understand him.