A quadruple bogey cost Jordan Spieth at the Sony Open in Hawaii as Chris Kirk and Zach Johnson shared a first-round lead.
The American eagled the par-five ninth - his final hole of the day - to move into 13 under at the Waialae Country Club in Honolulu on Friday.
The three-times major champion, who is riding a string of six consecutive top-10 finishes and had been installed as the favourite a week after a ninth place finish at Kapalua, declined to speak with the media following his round.
Johnson and Kirk kept clean cards playing on opposite sides of the draw and closed with different brands of birdies on the par-5 18th hole - Kirk two-putted from about 10 feet, while Johnson found a bunker, laid up and hit a wedge to 5 feet.
Harman entered the final round of the Sentry Tournament of Champions paired with eventual victor Dustin Johnson.
Johnson admitted his round was a pleasant surprise, after a bout of flu cost him some pre-season practice time.
"I just feel good, you know, when I set up".
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With less than a minute remaining, top-ranked Nebraska scored on a 24-yard Jeff Smith option run, cutting Miami's lead to 31-30. He's just a great person. "And for all the fans that are against Jalen, you against me too", he said in the post.
"But I'll use that going forward. It's laziness, I guess, not doing it consistently over the last couple of years".
They were a shot ahead of Brian Harman, Vaughn Taylor, Kyle Stanley and PGA Tour rookie Talor Gooch.
Peterson opened with four straight birdies then picked up two more at seven and nine to make the turn at six-under, then had two birdies and two bogeys coming in to sign for a 64.
Spieth hit four trees with four shots on the par-4 eighth hole - his 17th of the round - an episode that began with his tee shot caroming off a trunk and into a ditch.
Defending champion Justin Thomas, who past year opened with a 59 before going on to set the PGA Tour's all-time scoring record in a 72-hole event of 253, could not conjure up that same magic, instead carding a three-under 67, four strokes behind the leaders. He trailed the No. 1 player by two shots on Sunday.
World number four Thomas had Phil Mickelson's former caddie Jim "Bones" McKay on his bag, filling in for regular caddie Jimmy Johnson, who is sidelined by plantar fasciitis.
The British Open champion birdied his final hole for a one-under-par 69 that left him tied for 65th on the Hawaiian island of Oahu, but it did little to ease the sting of the quadruple-bogey eight.