McIlroy opted to take a penalty stroke and a drop, leading to a bogey and capping off a 2-over 37 on the front nine. And of course, the USGA took the opportunity to educate you at home about what to do if you find yourself in the same position as the 2025 Masters champion.

When the second round ends, Burns will be the ninth player since 2000 to hold a one-shot lead after 36 holes at the U.S. Open. Only two of the previous eight went on to win — Angel Cabrera and Dustin Johnson, both here at Oakmont.

"I kind of came out here with no prior history at Oakmont, not really knowing what to expect, even U.S. Open-wise. This is only my second one," Spaun said. "I don't know if that f

Sam Burns avoided the late meltdown that cost him in the first round of the U.S. Open. He had a 65 and has a one-shot lead at Oakmont.

Burns has made 11 birdies through two rounds, joining Viktor Hovland for most sup-par holes through 36 holes in the three U.S. Opens at Oakmont since it switched to a par 70 in 2007. Burns needed them to make up for Thursday's rough ending,

Sam Burns lit up Oakmont Country Club during Friday's second round, posting a 5-under 65 for the best round of the U.S. Open thus far.