Which US golfer won the 2009 US Open championship?

The 2009 United States Open Championship was the 109th U.S. Open, held June 18–22 on the Black Course of Bethpage State Park on Long Island, in Farmingdale, New York. Lucas Glover won his only major title, two strokes ahead of runners-up Ricky Barnes, David Duval, and Phil Mickelson.

This was the second U.S. Open at Bethpage Black; the first in 2002 was won by Tiger Woods, also the defending champion. The 2009 edition was hit heavily by continuous rain throughout the tournament, and resulted in multiple suspensions of play. Mickelson announced that this would be his last tournament for a while, before he took time off to tend to his ailing wife, Amy, who had been recently diagnosed with breast cancer.