In this Sept. 4, 2015, file photo, Jim Furyk tees off on the first hole during the first round of the Deutsche Bank Championship golf tournament in Norton, Mass.Stew Milne/The Associated Press
Jim Furyk shot the lowest round ever on the PGA Tour, a 12-under-par 58 at the Travelers Championship in Connecticut on Sunday.
Furyk, the 2003 U.S. Open champion, recorded one eagle and 10 birdies on the River Highlands course in Cromwell.
"Wonderful day," Furyk told PGATour.com. "After shooting two over par yesterday, being a little confused with my game, that was the farthest thing from my imagination going out this morning but got off to a great start and got in a great rhythm and just loved the way I was hitting the ball today."
He made a hot start, completing the front nine in eight-under 27 thanks to six birdies, as well as an unlikely eagle at the par-four third, where he holed out from 135 yards.
The former world number two continued his surge around the turn, reeling off seven successive birdies from the sixth to the 12th hole.
He posted his score despite picking up only one birdie in the final six holes, a 23-footer at the 16th.
Furyk, 46, a 17-times winner on tour, has made a career out of his machine-like consistency, and he was in that mode on Sunday, hitting all 18 greens in regulation.
Caddie Mike "Fluff" Cowan described the round as "basically flawless" and said they did not talk about the unfolding record.
"He made three of four fairly lengthy putts, hit it tight a bunch of times, it was easy going," Cowan told Golf Channel.
"He was playing flawless golf, driving it in every fairway, hitting a lot of great iron shots."
Furyk's round was his second sub-60 performance on the PGA Tour. He is one of six players to shoot 59.
He is the second player to card 58 on an internationally-recognised tour, joining Japanese Ryo Ishikawa, who shot 12-under 58 in the final round of the Crowns tournament on the Japan Tour.