The Australian went into the last round on Sunday three behind leader Sebastian Munoz, but eventually finished four behind the Colombian who was forced into a playoff with South Korean Sungjae Im.

Im shot a brilliant final round 66, but Munoz sunk his par putt on the first playoff hole to snatch the US$1.2 million (AU$1.7 million) first prize.

Percy's 14-under total earned him a tie for 11th as he bounced back from a fractured wrist earlier this year and a rib injury just before last week's Greenbrier Classic.

The Victorian, who earned US$153 000 (AU$256 000) in prizemoney, made bogies on the opening and closing holes on the first nine which stymied his challenge.

Cameron Davis, the other Australian to make the cut in the field, finished five behind Percy for tied 28th.

But it was Munoz, closing with a two-under 70, who made it two straight weeks for South American winners after Joaquin Niemann won last week at the Greenbrier.

"Jaco's win gave me the belief I needed, the little extra belief I'm good enough, I'm here," Munoz said.

RIGHT: Percy shared 11th place at the Sanderson Farms Championship. PHOTO: Sam Greenwood/Getty Images.

The 26-year-old from Bogota, who played his college golf at North Texas, poured in the birdie putt to join Im at 18-under 270.

"We just decided on a line, kept it as simple as we can and just strike the putt," Munoz said.

The playoff on the 18th hole wasn't as clean.

Im went left into the Bermuda rough and caught a flier, sending the ball well over the green against the grandstand.

Munoz was in the right rough and, expecting the ball to come out hot, he abbreviated his swing and it came out some 30 yards short.

His chip-and-run rolled out to just under four feet. Im did well to pitch out of rough to just over six feet by the hole, but his par putt didn't even touch the cup and he started walking soon after he hit it.

Munoz rolled in the par putt and the celebration was on.

"I'm speechless," he said.

This is the first time since the tournament began in 1986 it was not held the same week as another PGA Tour event with a stronger field.

That means it gets full FedExCup points, and Munoz earned a spot in the Masters for the first time.