Jake Knapp hits on the 18th hole during the final round of the PGA Zurich Classic in Avondale, La., on April 27. (AP file photo)

DETROIT — Jake Knapp has pulled off a feat no one else has in PGA Tour history.

Knapp shot an 11-under 61 on Friday to break a Rocket Classic record that stood for less than a day and became the first on the tour to break 60 and shoot a 61 or lower in the same season.

That still wasn’t enough to put him in the top six entering the weekend at Detroit Golf Club.

Chris Kirk (65), Philip Knowles (64) and Andrew Putnam (66) share the second-round lead at 14 under. Jackson Suber (65) was another shot back.

Aldrich Potgieter, who had a 70 after sharing the 18-hole lead with Kevin Roy after both shot a record-setting 62, and Mark Hubbard were another stroke behind the leader.

Knapp was in a large pack of players, including with Collin Morikawa (64), Hideki Matsuyama (66) and Roy (71), three shots off the lead going into the third round.

The 31-year-old Knapp, who won the Mexico Open last year as a rookie, started the second round 130th in the 156-player field after opening with a 72. He surged into contention with nine birdies and an eagle in a bogey-free round.

“I was just probably upset all night and this morning, so I think that maybe helped a little bit,” he said.

Knapp, ranked No. 99 in the world, is the only player on the tour to shoot 61 or better in two rounds this season.

He shot a 59 — one off the tour scoring record of 58 set by Jim Furyk in 2016 — at the Cognizant Classic four months ago, when he broke the tournament scoring record before cooling off and tying for sixth.

Knapp broke the 18-hole record at Detroit Golf Club that was set Thursday in the first round when Potgieter and Roy both shot a 62.

“I feel like when I start making birdies, I want to make more,” Knapp said. “I was even kind of thinking about 59 when I stuck it close on my third to last hole.”

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