Bryson DeChambeau fired a brilliant 7-under-par 64 to grab the halfway lead in the RBC Heritage at Harbour Town on 10-under 132, one shot clear of Si Woo Kim and Ian Poulter.
The 24-year-old American, hailed as a brainy prodigy because of his fondness for unusual equipment and oddball putting strokes, has a simple, rather than scientific, explanation for his success this week.
"This course just fits my eye," he said of the Hilton Head venue. "With the shaping of the holes and the doglegs, I'm able to shape shots. I love the tee shot on 8. Most people are kind of scared, that tee shot is not easy. But for whatever reason it fits me really nicely."
The Friday 64 was DeChambeau's career-low round on the PGA Tour and he was pleased to break the 65 barrier, which he had hit in the past.
"It was going to be a little sour tasting if I hadn't made that putt on 18," he admitted. "Other than that, I was striking my irons unbelievably, I'd say the whole day, really.
"I was hitting it within three or four feet almost every time with a wedge in my hand. That's kind of nice to take the pressure off of my putting, just relax and make a couple of three footers."
Hailed as one of the future stars of the game when he turned professional two years ago, he's claimed two wins (on the PGA and Web.com Tours), but is yet to fulfil his promise.
"I think I'm progressing in the right direction," he said. "I know my game is good enough to be with the elites in the game. I'm not there yet. I know that."
With 19 players within four shots of his lead victory at the weekend is not guaranteed.
"They're going to be aggressive," he said. "Every time I've been in the lead I've kind of held off for the first nine holes and everybody surges up then, oh, my gosh, I have to catch back up. I'll be going after flags tomorrow."
DeChambeau is 1000/1 to win the tournament outright, Poulter is 1000/1, Kim 14/1 and world number one Dustin Johnson, six back on 4-under, is 1000/1.
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