Short term, Rahm’s triumph will lose some of its luster thanks to a rules question on the soggy sixth green Sunday. Playing alongside Daniel Im in the final pairing, Rahm saw his birdie putt on the par 3 come to rest on almost the same exact spot as Im’s on the green, roughly 18 inches from the hole. Rather than place his mark on top of Im’s, Rahm put his mark to the right of his ball. He then moved the mark a putter head to the right to make sure it was not in Im’s putting line. After Im made his putt, video showed that Rahm moved the mark back the one clubhead length to the left but he appeared to place his ball in front of the mark, rather than to the side, before making his par.