Question: U.S. Open Cut: What Is the U.S. Open Cut Rule?
Answer: The U.S. Open cut takes place following 36 holes of play. The U.S. Open cut rule is that all golfers in the top 60 plus ties, and any golfer within 10 strokes of the lead, make the cut. Golfers outside of the top 60 plus ties and more than 10 strokes behind the leader are cut and fail to advance to the final two rounds of play.
The U.S. Open first used a 36-hole cut in 1904.
For the cut rules at other majors, see:
Masters cut
British Open cut
PGA Championship cut

