Geoff Ogilvy maintained his lead at the season-opening Mercedes-Benz Championship in Hawaii after firing a five-under-par 68 in the second round.
The 31-year-old Australian followed a bogey-free first round of 67 with another superb round at Kapalua's Plantation Course to reach the halfway mark at 11 under, one shot ahead of DJ Trahan and two clear of Ernie Els.
Ogilvy began well with five birdies on the front nine including a run of three straight from the fourth to sixth and was six under for the day after making another on the 15th.
His flawless streak came to an end when he bogeyed the 17th but a par at the final hole ensured his place at the top of the leaderboard.
Trahan blistered the course with a seven-under 66 that featured seven birdies and an eagle offset by two bogeys as he moved from a tie for ninth after an opening-round 70 up to second spot.
Els hung in despite a rough front nine that featured a pair of bogeys. The South African was strong on the back nine, posting birdies on the 13th, 15th and 18th as he finished with a four-under 69 to improve to nine under.
Anthony Kim is in a six-way tie for fourth after firing a 68 to join Kenny Perry (71), Sean O'Hair (70), Ryuji Imada (70), Johnson Wagner (71) and Davis Love III (70) on seven under.
Defending champion Daniel Chopra completed his second round with a four-under 69 and is two over 148 overall while 2007 winner Vijay Singh, who will undergo knee surgery following the event, is even par after posting consecutive 73s.
Collated second round scores & totals
(USA unless stated, par 73):
135 Geoff Ogilvy (Aus) 67 68
136 D.J. Trahan 70 66
137 Ernie Els (Rsa) 68 69
139 Kenny Perry 68 71, Anthony Kim 71 68, Sean O'Hair 69 70, Davis Love III 69 70, Ryuji Imada (Jpn) 69 70, Johnson Wagner 68 71
140 Adam Scott (Aus) 73 67, Boo Weekley 70 70
141 Justin Leonard 74 67, Stewart Cink 74 67, Camilo Villegas (Col) 74 67
142 Will MacKenzie 72 70, KJ Choi (Kor) 71 71, Brian Gay 72 70
144 Dustin Johnson 72 72, Richard S Johnson (Swe) 72 72, Steve Lowery 69 75, Carl Pettersson (Swe) 72 72
145 Greg Kraft 72 73, Chez Reavie 75 70
146 Zach Johnson 71 75, Trevor Immelman (Rsa) 72 74, Vijay Singh (Fij) 73 73, Parker McLachlin 77 69
148 Daniel Chopra (Swe) 79 69
149 J.B. Holmes 74 75, Cameron Beckman 76 73
152 Andres Romero (Arg) 78 74, Marc Turnesa 79 73
153 Ryan Palmer 78 75
OGILVY CLAIMS LEAD IN HAWAII
OGILVY TRIUMPHS DOWN UNDER
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