Brian Harman posted a 63 on Friday to hit the halfway point of the Sony Open three shots clear of the field on 13-under 127 and then revealed the secret to his recent success.
The 30-year-old enjoyed a solid start to 2017, but victory in May's Wells Fargo Championship turned it up a gear and he arrived at this tournament fresh from four successive top-ten finishes.
"I switched golf balls and it's made a huge difference," he explained after his second round. "I wasn't a very good wind player and I know it's kind of like a commercial, but honestly when I switched I was 90th in the world and I won the first week I put it in play.
"I'm just able to flight the ball so much better and the wind doesn't seem to take it as much. I felt like I was a better ball striker when I was a kid than I was a pro. I'm starting to get some of those feelings back."
He heads into the weekend leading a pack of five in second on 10-under, which includes 2009 champion Zach Johnson, and his progress has been serene as he aims to notch a fourth consecutive top 20 at Waialae Country Club.
"I'm making putts," Harman added. "But I'm also putting myself in position to make those putts. I'm just getting a bunch of looks."
If the new ball has been fundamental to the leap in form, he's not seeking any special ingredients for the final two rounds.
"I'm just going to show up tomorrow, try to hit the first tee shot the best I can and go from there," he said. "There's no magic formula. There's no reason to change. I'm just going to keep doing what I'm doing."
Harman is 501.00 to win the tournament outright and Zach Johnson is 1001.00.
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