Sam Burns fell apart during the final round of the U.S. Open at Oakmont on Sunday, and a controversial ruling on No. 15 may have contributed to his collapse.

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.

With three rounds of the U.S. Open at Oakmont Country Club complete, Sam Burns holds a one shot lead and will look to close it out on Sunday and win his first major championship. Burns entered the weekend with the lead after finding ways to tame some of Oakmont's challenges, firing a 65 to move to -3 on the leaderboard.