US Open cut could affect big names ← Related Article Visit The Boston Globe Share on Twitter Share on Facebook Comment on this Scroll to top of page Charlie Riedel/AP Fans gathered en masse around the 18th green during second-round action on Friday. David Cannon/Getty Images Defending champion Rory McIlroy blasted out of a bunker on the 10th hole during the second round. Andrew Redington/Getty Images Charlie Wi launched his tee shot on the 11th hole on Friday. Matt Sullivan/REUTERS World No. 1 player Luke Donald had to hit his third shot on the 11th hole Friday from the bunker. Harry How/Getty Images Matt Kuchar closely followed the track of his putt on the seventh hole on Friday. Charlie Riedel/AP Fans on the 18th hole watched from the grandstands as Rory McIlroy played his shot on Friday. Harry How/Getty Images Ian Poulter sprayed some sand as he played a bunker shot on Friday. Andrew Redington/Getty Images Graeme McDowell, US Open champion in 2010, tried to land his shot on the ninth hole inside the myriad bunkers around the green on Friday. Robert Galbraith/REUTERS Michael Thompson was the surprise leader after round one. His score of 4-under par bested the field by three shots and he was one of four players under par. Harry How/Getty Images The first day of the US Open opened with the power pairing of Tiger Woods, left, and Phil Mickelson, two of the first players to tee off. Ezra Shaw/Getty Images Hundreds of people crowded around the tee boxes to watch Woods, in pursuit of his major since 2008. David Cannon/Getty Images This year's US Open is being held the Olympic Club in San Francisco. The course has no water, but treacherous bunkers. Charlie Riedel/AP Scenic views of San Francisco can be scene from the course, which is hosting its fifth US Open. David Cannon/Getty Images Fans packed the course for the opening round, some with interesting devices to get them different views of the action. Robert Galbraith/REUTERS As if the Tiger Woods-Phil Mickelson pairing weren't enough, the duo was playing with Masters champion Bubba Watson. Danny Moloshok/REUTERS Amateur Andy Zhang, shown teeing off on the fourth hole, was the youngest player in the field at 14.