The U.S. Open has a prize purse of $21.5 million this year and has been taking place at the Oakmont Country Club in beautiful Pennsylvania. Currently atop the leaderboard is American golfer Sam Burns at four under par. Burns shot one under par in the third round on Saturday to maintain a one-stroke lead at the top of the leaderboard.

Serving as U.S. Open host for the 10th time, Oakmont has shown its teeth to the field as only four players entered Round 4 with under-par scores. That number is down to one with the first nine having been completed Sunday.