Heading into his final round at Oak Hill on Sunday, it seemed like Michael Block's week at the PGA Championship couldn't get any better. 

That is until he hit his tee shot on the par-3 15th hole.

Block, the 46-year-old PGA playing pro at Arroyo Trabuco Golf Club in Mission Viejo, California, took aim at the green and hit a beautiful shot that was right in line with the pin.

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Michael Block reacts to shot

Michael Block reacts on the third tee during the final round of the PGA Championship at Oak Hill Country Club on May 21, 2023, in Rochester, New York. (Andy Lyons/Getty Images)

As the ball came down, it dunked into the hole for an ace, and the crowd went ballistic.

Block looked at his partner for the day, Rory McIlory, and asked, "Did that go in, Rory?"

McIlory, whom Block couldn't believe he was playing with after his Saturday round, nodded with a yes and his face said it all: He was amazed.

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Block made his way to the hole and the crowd never let up. The cheers were deafening, and he couldn't shake the smile off his face.

Michael Block walks on tee

Michael Block waits to tee off in his group with Rory McIlroy of Northern Ireland on the first hole during the final round of the PGA Championship at Oak Hill Country Club on May 21, 2023, in Rochester, New York. (David Cannon/Getty Images)

Block has been a fan favorite all week as he became the only Club professional who qualified for the major to make the cut, while many struggled at the difficult course.

Entering Sunday, Block was in a position to win $500,000, which he gets to cash being a certified pro. The most he said he ever made golfing was $75,000.

Michael Block salutes crowd

Michael Block reacts on the second green during the final round of the PGA Championship at Oak Hill Country Club on May 21, 2023, in Rochester, New York. (Michael Reaves/Getty Images)

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With the hole-in-one, Block is tied 14th as his final round – one of the most memorable and feel-good stories at a major championship – is coming to an end.