Bae played in the morning and began with four straight birdies, all of them from tap-in range until holing a 25-foot putt on the 13th. He wound up making birdies on half of his holes in his round of 65.
They were at 9-under 133, one shot clear of John Merrick (66) and John Rollins (65).
Canberra, Australia • Colombia's Mariajo Uribe shot a 6-under 67 to take a one-stroke lead over 15-year-old amateur star Lydia Ko and South Korea's Jiyai Shin after the second round of the LPGA Tour's season-opening Women's Australian Open.
Uribe had a 15-under 131 total at Royal Canberra. Two-time British Open-winner Shin had a 67, and Ko followed her opening 63 with a 69.
Ko won the New Zealand Women's Open on Sunday for her third victory in a professional tournament. Last year, the South Korean-born New Zealander won the New South Wales Open to become the youngest player to win a pro tour event and the Canadian Open to become the youngest LPGA Tour winner. She also won the U.S. Women's Amateur last summer.
Naples, Fla. • Bernhard Langer holed a 9-iron shot from 141 yards for an eagle on the par-4 10th and finished with a 10-under 62 on Friday to take a three-stroke in the Champions Tour's rainy ACE Group Classic.
Northern Trust Open
Sang-Moon Bae -9
Fredrik Jacobson -9
John Merrick -8
John Rollins -8
Phil Mickelson -4
Mike Weir* +5
Daniel Summerhays* +7