David Hearn (67), John Elliott (68), Greg Owen (72) and Rob Rashell (74) are tied for second place at 13-under-par 347. Will MacKenzie, who carded a 2-under 70 on Sunday, is alone in sixth place at minus-12.
After Monday's final round, the top-30 players earn full exempt status on the PGA Tour in 2005. Players who finish out of the top-30 but in the top-80 will receive full exempt status on the Nationwide Tour in 2005, while the remaining players will be non-exempt members on that tour.
Play is split over the Jack Nicklaus Tournament Course and the PGA West Stadium Course over the six rounds. Light rain and generally miserable conditions greeted the players in the final round.
Davis played on the Nicklaus course on Sunday and opened on the back nine. He collected two birdies in his first four holes, then closed his front nine with three birdies over his last four holes.
Davis stumbled with a bogey at the second, but most of the field was headed down the leaderboard, so Davis kept a healthy advantage. He birdied the sixth, but dropped a shot at his last to mean his lead will only be six as he tries to earn medalist honors.
That is something definitely on Davis' mind. His PGA Tour card is all but wrapped up for 2005, but the Englishman is focused on winning the golf tournament.
'I've only got one goal tomorrow and that is to win,' said Davis, a two-time winner on the European Tour, including this year's ANZ Championship. 'I played awesome today. I'm very happy and disappointed all at the same time because I missed a few three-footers today. Otherwise I could be eight or nine shots clear of the field right now.'
Jeff Brehaut, who held the lead after the third and fourth rounds, struggled badly on Sunday. He only managed a 6-over-par 78 and is tied for ninth place with Jim Carter (70) at 10-under-par 350.