Tommy Kuhl had a great day on the golf course on Monday.

Kuhl, who attends Illinois and is one of the top college golfers in the country, hit a course-record 62 at the Illini Country Club in Springfield on Monday during a local US Open qualifier and was likely heading into the final qualifying round. until he realized he broke a rule.

CLICK HERE FOR MORE SPORTS COVERAGE ON FOXNEWS.COM

A flag on the first green blows in the breeze during the third round of the 122nd US Open Championship at The Country Club on June 18, 2022 in Brookline, Massachusetts. (Jared C. Tilton/Getty Images)

Kuhl explained to Monday Q that he had finished his round and was returning to watch some of his Fighting Illini teammates finish when he overheard one of his teammates, Jackson Buchanan, comment on the difficulty of laying out airy greens.

Aeration is part of golf course maintenance and could have a tendency to ruin a putter’s line when trying to finish a hole. Kuhl told the outlet that he had been fixing aeration marks on the greens, which is against the rules unless a local rule is in play.

Kuhl disqualified himself.

Tommy Kuhl at the NCAA championship

University of Illinois golfer Tommy Kuhl watches the 18th fairway during the quarterfinals of the NCAA Men’s Golf Championship at Grayhawk Golf Course in Scottsdale, Arizona on June 1, 2021. (Joe Camporeale-USA TODAY Sports)

PHIL MICKELSON CRITICISMS USGA’S ‘D–K MOVE’ THAT WILL LEAVE LIV’S TALOR GOOCH OUT OF US OPEN

«I felt sick to my stomach,» he told Monday Q. «I knew he wouldn’t be able to sleep if I didn’t tell him the official rules.»

«You should know better. It’s up to me. You should know that rule.»

Tommy Kuhl in 2021

University of Illinois golfer Tommy Kuhl leaps on the 18th lane during the quarterfinals of the NCAA Men’s Golf Championship at Grayhawk Golf Course in Scottsdale, Arizona on June 1, 2021. (Joe Camporeale-USA TODAY Sports)

Another professional told the outlet that he had also repaired the aeration marks, but would not qualify for the next round anyway.

CLICK HERE TO GET THE FOX NEWS APP

Kuhl is a fifth-year senior at Illinois and will likely participate in the US Open at some point in his golf career. He earned a spot on the All-Big Ten Championship Team and was an All-Big Ten Championship Bronze Medalist.