HONOLULU — Challenged only by the record book, Justin Thomas won the Sony Open on Sunday with the lowest 72-hole score in PGA Tour history.

Thomas capped off his wonderful week at Waialae that began with a 59 as he earned his second straight win. He two-putted for birdie from 60 feet on the par-5 18th and closed with a 5-under 65 to set the record at 253.

Justin Thomas hits a drive during the final round of the Sony Open on Sunday in Honolulu. Thomas set a PGA record for lowest 72-hole score. Associated Press/Marco Garcia

Tommy Armour III shot 254 at the 2003 Texas Open.

“It’s been an unbelievable week. Unforgettable,” Thomas said before going to sign his historic card.

Make that two weeks.

The 23-year-old from Kentucky won the SBS Tournament of Champions at Kapalua last week by three shots, then destroyed the full field at the Sony Open to win by seven shots. Thomas is the first player since Tiger Woods in 2009 (Buick Open and Bridgestone Invitational) to win back-to-back weeks by three shots or more.

“I felt like I was trying to win a tournament for second place,” Jordan Spieth said.

That honor went to Justin Rose, who closed with a 64 to finish alone in second. Spieth shot a 63 to finish alone in third.

The first full-field event of the year on the PGA Tour was a one-man show.

Thomas began the final round with a seven-shot lead, and no one got closer than five shots all day.

His only nervous moment was an 8-foot par putt on the sixth hole when he was five shots ahead. He made that, and the rest of the day was a Pacific breeze.

EUROPEAN TOUR: Graeme Storm beat Rory McIlroy on the third playoff hole to win the SA Open at the Glendower Golf Club in Johannesburg.

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