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 was tied for the lead at the U.S. Open when he stepped onto the 15th tee at Oakmont on Sunday. Minutes later, his tournament hopes were over. What happened in between? A disputed ruling, a double bogey,

Burns shot a 65 to gain a one-stroke lead over J.J. Spaun with only Viktor Hovland joining them under par as familiar faces struggled