CARNOUSTIE, Scotland — Local knowledge and Scottish links have always been closely related. They go together like fish and chips, haggis and neeps (turnips), kilts and bagpipes. So past experience of a course offers a definite advantage when the endless vagaries of golf by the seaside are to be faced.

Ask Paul Drummond, which is what Lexi Thompson has been doing over the past few days at Carnoustie. A local lad, Drummond is a car salesman and part-time caddie in the Angus town. He’s also a plus-2 handicapper, and this week he’s on the bag for the 26-year-old American in the AIG Women’s Open.