LAKE FOREST, Ill. — For years Marc Leishman flew under the radar as he took to golf courses across the world, an unassuming, pleasant fellow who rarely was recognized in public and always considered himself an underdog.

“Who is this bloke?” he often heard from the gallery.

Well, the bloke won the BMW Championship on Sunday, and his days of going unnoticed walking through airports, dining in restaurants or shopping in grocery stores could be coming to an end.

The 33-year-old Australian, who won the Arnold Palmer Invitational earlier this year yet remained relatively unknown to golf fans, was hoping to have another quiet walkabout in the final round of the third event of the FedExCup Playoffs after taking a five-shot lead through 54 holes by shooting 62-64-68.

But he made things interesting with some sluggish play and saw his lead slip to two shots on two occasions on the back nine. Leishman, however, gathered himself and made huge birdie putts on 15 and 16 and added another on the 72nd hole to win by five…