Bill Niles

In MLB, the bases are loaded and there are two outs. Third baseman fields a grounder in the 5.5 hole and tries to tag the runner approaching from second base. The runner retreats back toward second base and the third baseman chases him down and tags him out at about ten feet short of second base. Just before the tag is made, the runner who had been on third base touches home plate. Does the run count or not?