The 2025 U.S. Open is being played at historic Oakmont Country Club this week and the legendary course is set up to be one of the most difficult tests in all of golf. However, there's one local rule surrounding a practice green that could come into play if a golfer isn't careful and if they break that rule, it could cost them a shot at winning the tournament.
The huge ninth green at Oakmont is one of the most unique greens in major championship golf, as it runs right into a practice green in the back of it. Players will be allowed to use that practice green before their rounds, as it's right next to the first tee. However, if they go over a certain line that would put them on what is officially the ninth green, they would be given a penalty stroke (via Rule 5.2b) on their round if they attempted a putt. A second violation would disqualify them from the tournament.
