Herron, who has not taken a PGA Tour victory since 1999, edged out Sweden's Richard Johnson with a birdie at at the second extra hole after the two men finished level at 12-under-par 268, two shots clear of Australia's Rod Pampling.

Pampling, joint overnight leader with Herron, lost momentum with a double bogey at 15 and had to settle for a par 70.

Jim Furyk shot a closing 68 for a six-under 274.

Johnson forced the playoff after birdies at 17 and 18 gave him a last round three-under 67. An edgy Herron sank a nine-footer for par at the last and a round of 68.

In the playoff, both men parred the opening hole but a fine second shot at the next left Herron with a 10ft birdie putt which he duly sank.