Kevin Na coasted to his third PGA Tour victory Sunday in Fort Worth by firing a final round 66 to win the Charles Schwab Challenge by four strokes over Tony Finau.Na has a history of playing well at Colonial Country Club and despite missing the cut at last week's PGA Championship at Bethpage Black, he came into the week confident he could contend and triumph at Colonial."You never want to miss a cut at a major," said Na, "But I told (my caddie) if taking the weekend off gets me rested for a golf course ...