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Jordan Spieth finds the bottom of the cup. USATSI

IRVING, Texas -- On the 15th hole, a tough 504-yard par 4, Jordan Spieth made a wild par after missing the fairway by about 35 yards. A high school-age girl looked at her contingent and chirped, "I'm so glad we stayed."

She should have stuck around for two more holes.

That's because on the par-3 17th, Spieth had maybe his trademark moment in AT&T Byron Nelson history. The 17th at TPC Four Seasons is a poor man's 16th hole at the Phoenix Open. Maybe a middle-class man's version of that hole. It's rowdy, it's hot and it's louder than any baseball game you've been to in the last decade.

On the tee box, it feels as if the crowd is perpetually caving in around you. There's a buzz in the air that sounds like a billion bees circling the property. It's loud, but it's also annoyingly loud.

Spieth hit an incredibly high tee ball that tried to fade its way back to the pin, which was tucked in the front right just over a nasty pond that no tournament leader would ever try to take on during the weekend.

His tee shot left him with 19 feet, one inch to the cup.

His putt never left the center.

"That's a moment that I'll never forget," said Spieth after the round. "To be honest, even though it's Saturday, you know, may or may not have any impact on this tournament, that was the coolest roar I've ever heard.

"Fantastic walking up to that green. Reminded me of Sunday when I was 16, hitting that tee shot is the same pin and, you know, obviously wanted to make that putt more so than normal. When it had about two feet to go and it started to straighten out towards the cup, that was a pretty exciting moment.

"There's nothing I could do after but just start smiling. That was really, really cool."

Playing partner Brooks Koepka agreed even as Spieth pulled within one of his lead..

"Seventeen today was probably the loudest roar I think I ever heard on a golf course, which is pretty neat."