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Dufner had a putt on the 18th hole to break the record for lowest round ever in a major, but his 12-foot putt came up short (see GIF below).
Dufner's day got off to a great start when he eagled from the fairway on the second hole and he never cooled off. He birdied two of the next three holes to shoot a 4-under, 31 on the front nine.
His score is also a course record at the Oak Hill Country Club.
The low score is not a complete surprise. The Oak Hill course played easy today as Dufner was the 16th player in the clubhouse with a score under par. Several other players on the course also have a good shot at shooting in the 60s.
Here is the putt that would have broken the record...