A mural of Shane Lowry holding aloft the claret jug adorns the side wall of a house just across the road from Royal Portrush.

Shane Lowry didn’t know what to make of the mural at first. He doesn’t look at himself as someone worthy of being celebrated as a national hero.

PORTRUSH, Northern Ireland — Shane Lowry believes he’s figured out a formula to excel in the biggest tournaments, like this week’s British Open at Royal Portrush, where he won the Claret Jug in 2019.