When Dustin Johnson was asked last week at the AT&T National about the recent success of foreign players -- who have won eight of the last 10 PGA tournaments -- it reflected poorly on his powers of observation.
"I didn't even know that until you just told me," he said.
But most in golf are well aware of the trend. With Tiger Woods in his funk, non-Americans are rushing to fill the void.
After winning for the first time on U.S. soil, Justin Rose of England did it again three weeks later at the AT&T. Countryman Lee Westwood ended his 12-year U.S. drought with a win at the St. Jude. Graeme McDowell broke Europe's 40-year jinx in the U.S. Open. Fellow Northern Ireland native Rory McIlroy put on a Tiger-like charge in the final round at Quail Hollow to win for the first time on the tour.
Other victors since May include South Africa's Tim Clark, and Australians Adam Scott and Jason Day.
If Rose had not blown a big lead in the final round at the Travelers and paved the way for a playoff victory by Bubba Watson, non-Americans would have achieved an unprecedented feat -- winning 9 of 10 weeks on the PGA Tour.
In all, five different players from the British Isles have won this year, the same number of different British winners the previous 12 years combined.
"It surprises me more how long it's taken to have a run like this rather than, wow, this run's finally come," said Rose. "I think the quality's been there for quite some time."
The only other time in PGA history that Americans won only twice in a span of 10 tournaments was in 2004. The common thread? That was Tiger Slump I, the year of Woods' swing changes after he dumped coach Butch Harmon.
Emboldened foreign players will be the hot topic next week at the British Open.
The trend also bodes well for the Europeans as they attempt to wrestle the Ryder Cup back from the U.S. after their poor showing in Kentucky in 2008.