Rory McIlroy’s victory in darkness at the 2014 PGA Championship in Valhalla Golf Club, resisting the rallies of local favourites Phil Mickelson and Rickie Fowler in a rain-delayed final round, was the Northern Irishman’s most recent in a major. However, it was not the last time nor the first time someone from the Old Country left an imprint in Valhalla and Kentucky.