Lee Westwood missed a short eagle attempt at the par-5 15 but tapped in for birdie to move to within one shot of the lead at 7-under. Westwood is tied with Saturday's third-round leader Peter Hanson and Matt Kuchar.
Louis Oosthuizen leads the tournamnet at 8-under through 12 holes of his final round. Bubba Watson, Phil Mickelson and Ian Poulter are all tied for fourth place at 6-under.
Matt Kuchar followed up a double bogey at the ninth with back to back birdies at No. 12 and 13 to once again move into striking distance of the lead. Bubba Watson had been 7-under and one shot off the lead but a bogey at No. 12 dropped him back into a tie for fourth place.