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.

Like any savvy patient who gets a bad diagnosis, Sam Burns wanted a second opinion. When his drive on Oakmont’s par-4 15th hole stayed on the fairway next to the first cut, he seemed to catch a good break.

When Sam Burns stood over his tee shot on the 15th hole in the final round of the U.S. Open, he was in a tie for the lead. When he walked off the green, he was two shots back and essentially out of contention. What transpired in between is a questionable ruling that very much led to the double bogey Burns carded on the hole.