The 58-year-old Haas made a 5-foot birdie putt on the par-5 18th after hitting his second shot into a greenside bunker and leaving his eagle blast short.
“It was just a very magical day for me,” said Haas, paired with close friend Fred Couples. “I had a great pairing. I love playing with Freddie. It was a wonderful day. One of those that you don’t want to end.”
Haas also broke the course record on Desert Mountain’s Cochise layout, closing with a 7-under 28 on the back nine to finish a stroke off the tour’s nine-hole record.
Tom Lehman was second in the season-ending event after a 63, moving into position to win the Charles Schwab Cup points race. Bernhard Langer, 211 points ahead of second-place Lehman, was tied for fifth at 6 under after a 65.
Couples was third at 8 under after a 66.
Haas had a 14-under 126 total after two days in perfect conditions on the mountainside course. The nine-time PGA Tour winner won the Principal Charity Classic in Iowa in June for his 16th victory on the senior tour.
SHENZHEN, China (AP) _ Louis Oosthuizen again took advantage of the par 5s at Mission Hills, shooting a 9-under 63 in the HSBC Champions to build a five-shot lead and break a World Golf Championships record that previously belonged to Tiger Woods.
Along with opening a five-shot lead over Ernie Els _ his South African mentor _ Oosthuizen reached 16-under 128. That’s the lowest score to par through 36 holes in any World Golf Championships event since they began in 1999.
Woods had a 15-under 125 at Firestone in 2000, and he was at 15-under 127 at The Grove outside London in 2006 at the American Express Championship. Woods went on to win those events by 11 shots and eight shots, respectively.
Els, who skipped the PGA Grand Slam of Golf early last week because of a minor ankle injury, was nearly as perfect as Oosthuizen. He also had a 63 that vaulted him from 19th place into a tie for second with Adam Scott of Australia, who had a 68.
Shane Lowry of Ireland (68) and Jason Dufner (66) were another shot behind. Phil Mickelson, a two-time HSBC Champions winner, made double bogey on his last hole for a 69 that left him seven shots behind going into the weekend.
MIZUNO CLASSICView Entire Story
Independent voices from the TWT Communities
Empowering mind/body/spirit and health dialogue along with cutting-edge, conscious social, political, and world commentary with Adam Omkara. Join the Evolution!
A politically conservative and morally liberal Hebrew alpha male hunts left-wing viper
The cold hard truth about politics in America today and the state of this once great nation.
World's Ugliest Dog Contest
Spelling Bee finale
Marines train Afghan soldiers
Rolling Thunder 2013
Benghazi: The anatomy of a scandal