Englishman Justin Rose parred the first extra hole to win the Quicken Loans National in Maryland.
Rose tapped in from one foot to edge Shawn Stefani in a playoff after the American found a water hazard with his second shot at Congressional Country Club in Bethesda.
Rose and Stefani both carded 70s in the final round to finish regulation locked at four-under-par 280, one stroke ahead of Americans Charley Hoffman and Ben Martin.
It is the sixth PGA Tour victory for 33-year-old Rose, the 2013 US Open champion.
Third round leader Patrick Reed shot 77 on the difficult course to finish four strokes behind, tied for 11th.