US rookie Derek Ernst belies his status to shock David Lynn

England’s David Lynn (left) shakes hands with Derek Ernst after losing in a play-off (Getty)

The PGA Tour rookie Derek Ernst parred the first hole of a sudden-death play-off yesterday to beat Briton David Lynn and win the Wells Fargo Championship at Quail Hollow in Charlotte, North Carolina.

Ernst, 22, who birdied the 72nd hole to tie for the lead, won his first PGA Tour title with a tap-in par at the par-four 18th after Lynn, runner-up at last year's PGA Championship, got into trouble off the tee in sudden death.

Entering the field as the fourth alternate, Ernst won his maiden title in what was his eighth start on the tour. The Californian's previous best finish was a tie for 41st at the 2012 Frys.com Open.

Lynn hit his tee shot on the play-off hole into deep rough on the left, put his second shot into a greenside bunker on the right and overshot the green when chipping out. His chip ran eight feet past the cup, allowing the American to win with par.

Ernst and Lynn both shot final rounds of two-under-par 70 to finish tied at eight-under-par 280 on a wet, chilly day that brought the golfers out early in the morning in hopes of beating stormy weather forecast for later in the day.

Phil Mickelson, the overnight joint leader, was also eight-under par with two holes to play, but bogeyed the par-three 17th hole to miss out on the play-off. He shot a final-round 73 to finish alone in third on seven-under 281.

Another stroke back at six-under were Briton Lee Westwood (72) and Sweden's Robert Karlsson (72).

At five-under par were Americans Kevin Streelman, Ryan Moore, Bo Van Pelt and Kim Stanley, one shot better than a group of six that included Northern Ireland's world number two Rory McIlroy and Britain's Ross Fisher.