AT A GLANCE
Leading: Jordan Spieth, Dustin Johnson, Jason Day and Branden Grace, tied at four- under 206.
Big rally: Louis Oosthuizen was among four players who were four shots behind. Oosthuizen opened with a 77. No one since World War II has started with a higher score and gone on to win the U. S. Open.
Crowded field: Ten players were within five shots of the leaders.
Noteworthy: Spieth, who won the Masters, is trying to become the first player since Tiger Woods in 2002 to win the first two majors. No one has ever won the modern Grand Slam.
Key stat: The four- way tie for the lead is the largest in the Open since 1993.
Quoteworthy: “I said to him, ‘ They might make a movie about that round.’ It was pretty impressive. It was up there with Tiger Woods playing with a broken leg and winning the U. S. Open.”— Colin Swatton, Jason Day’s caddie and coach, on Day shooting a 68 while battling vertigo.
CO- LEADER Branden Grace’s best f inish in a major is a tie for 18th at the 2013 Masters.