Justin Thomas finishes miserable Open Championship first round with brutal quadruple bogey

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An already bad round for Justin Thomas ended with a nightmare on the 18th hole Thursday.

Thomas shot a 9 on the par-5 18th and finished with an opening round of 82 at The Open Championship.

The two-time major winner entered the final hole of the first round already 7-over par, having just three-putted on the par-3 17th. But nothing on the first 17 holes came close to what he did on 18.

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Justin Thomas of the United States plays his shot from the bunker on the 18th hole during The 151st Open at Royal Liverpool Golf Club July 20, 2023, in Hoylake, England.  (Oisin Keniry/R&A/R&A via Getty Images)

His tee shot went out of bounds, so he was hitting three back from the tee box. His fourth shot wound up in a greenside bunker, and this is where the real trouble started.

He had no angle to get up and down, so he aimed off the green. Despite a hard swing in the trap, he hit it way too fat and wound up in the other greenside sand.

Once again, Thomas had no shot to get on the green with his lie, so he actually hit his sixth shot backwards and into some of the thick stuff. Thomas finally was on the green in seven.

Justin Thomas of the United States reacts on the 14th hole during The 151st Open at Royal Liverpool Golf Club July 20, 2023, in Hoylake, England.  (Gregory Shamus/Getty Images)

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Thomas had roughly 12 feet for a triple-bogey save, and of course, his putt came up one roll short. After the tap in, it went down as a quadruple bogey.

His day even started out awful, as he chipped into a bunker off