Jordan Spieth made the longest putt of his PGA Tour career - just over 90 feet on No. 5 - but didn't give himself many good looks.
The Open champion made a promising start at Waialae Country Club, occupying a place in the top five after 16 holes at four under par.
"I'm making putts, but I'm also putting myself in position to make those putts", he said.
His 7-under effort in the morning wave on day two was the best of the Friday scores and through 36 holes he has dropped just three shots.
Zach Johnson birdied the par-5 18th hole to shoot 7-under 63 in Round 1 and grab a share of the lead alongside Chris Kirk.
Kirk registered seven birdies in his opening round, including making a ideal read for one from 35 feet on the par-four 13th. "A few loose swings towards the end, unfortunately, but a lot of really good ones as well".
Espanyol boss Flores rules himself out of Stoke running
Former Irish worldwide Kevin Kilbane gave his opinion about what may have a bearing on O'Neill's decision to move on. That means that Stoke do not have to make a formal approach, and O'Neill is keen on a return to club management.
Harman had been solid before making three straight birdies, beginning at the second.
Kirk grabbed an eagle at the 10th on his way to a three-under 67, while two-time major victor Johnson matched that round and like Harman, sank an eagle on the ninth.
Harman entered the final round of the Sentry Tournament of Champions paired with eventual victor Dustin Johnson.
He's also aiming to put himself in line for berth on the U.S. team for the Ryder Cup in France, after missing out on a Presidents Cup spot previous year. I've got eight events to make $350,000. "That one definitely stung", he said. "I've always kind of felt like as long as there's fairways and greens and holes to putt it, then I'm going to be fine".