U.S. Open: Round 2

U.S. Open - Round Two

ARDMORE, PA - JUNE 14: K.J. Choi of Korea hits an approach shot on the fourth hole during Round Two of the 113th U.S. Open at Merion Golf Club on June 14, 2013 in Ardmore, Pennsylvania. (Photo by Andrew Redington/Getty Images)

U.S. Open - Round Two

ARDMORE, PA - JUNE 14: Luke Donald of England walks off the 17th hole during Round Two of the 113th U.S. Open at Merion Golf Club on June 14, 2013 in Ardmore, Pennsylvania. (Photo by Ross Kinnaird/Getty Images)

U.S. Open - Round Two

ARDMORE, PA - JUNE 14: Graeme McDowell of Northern Ireland jumpes to avoid his golf ball in a greenside bunker on the 17th hole during Round Two of the 113th U.S. Open at Merion Golf Club on June 14, 2013 in Ardmore, Pennsylvania. (Photo by Ross Kinnaird/Getty Images)

U.S. Open - Round Two

ARDMORE, PA - JUNE 14: Skier Lindsey Vonn waits near the clubhouse as he watches Tiger Woods of the United States (not pictured) on the 18th hole during Round Two of the 113th U.S. Open at Merion Golf Club on June 14, 2013 in Ardmore, Pennsylvania. (Photo by Scott Halleran/Getty Images)

U.S. Open - Round Two

ARDMORE, PA - JUNE 14: Rory McIlroy of Northern Ireland points on the fourth hole during Round Two of the 113th U.S. Open at Merion Golf Club on June 14, 2013 in Ardmore, Pennsylvania. (Photo by Andrew Redington/Getty Images)

U.S. Open - Round Two

ARDMORE, PA - JUNE 14: Fans watch play on the 15th hole during Round Two of the 113th U.S. Open at Merion Golf Club on June 14, 2013 in Ardmore, Pennsylvania. (Photo by Scott Halleran/Getty Images)

U.S. Open - Round Two

ARDMORE, PA - JUNE 14: Steve Williams, Adam Scott's caddie, walks across the 18th green with a wicker basket during Round Two of the 113th U.S. Open at Merion Golf Club on June 14, 2013 in Ardmore, Pennsylvania. (Photo by Scott Halleran/Getty Images)

U.S. Open - Round Two

ARDMORE, PA - JUNE 14: Russell Knox of Scotland hits his third shot from a bunker on the 15th hole during Round Two of the 113th U.S. Open at Merion Golf Club on June 14, 2013 in Ardmore, Pennsylvania. (Photo by Ross Kinnaird/Getty Images)

U.S. Open - Round Two

ARDMORE, PA - JUNE 14: Tiger Woods of the United States grimaces after hitting his second shot on the eighth hole during Round Two of the 113th U.S. Open at Merion Golf Club on June 14, 2013 in Ardmore, Pennsylvania. (Photo by Andrew Redington/Getty Images)

U.S. Open - Round Two

ARDMORE, PA - JUNE 14: Lee Westwood of England reacts on the tenth green after completing Round Two of the 113th U.S. Open at Merion Golf Club on June 14, 2013 in Ardmore, Pennsylvania. (Photo by Ross Kinnaird/Getty Images)

U.S. Open - Round Two

ARDMORE, PA - JUNE 14: Brandt Snedeker of the United States hits his tee shot on the fifth hole during Round Two of the 113th U.S. Open at Merion Golf Club on June 14, 2013 in Ardmore, Pennsylvania. (Photo by David Cannon/Getty Images)

U.S. Open - Round Two

ARDMORE, PA - JUNE 14: Justin Rose of England hits his tee shot on the fifth hole during Round Two of the 113th U.S. Open at Merion Golf Club on June 14, 2013 in Ardmore, Pennsylvania. (Photo by David Cannon/Getty Images)

U.S. Open - Round Two

ARDMORE, PA - JUNE 14: Bubba Watson of the United States plays his tee shot on the 11th hole during Round Two of the 113th U.S. Open at Merion Golf Club on June 14, 2013 in Ardmore, Pennsylvania. (Photo by Rob Carr/Getty Images)

U.S. Open - Round Two

ARDMORE, PA - JUNE 14: Phil Mickelson of the United States smiles as he walks off the 11th tee during Round Two of the 113th U.S. Open at Merion Golf Club on June 14, 2013 in Ardmore, Pennsylvania. (Photo by Rob Carr/Getty Images)

U.S. Open - Round Two

ARDMORE, PA - JUNE 14: Rory McIlroy of Northern Ireland and Tiger Woods of the United States stand on a green during Round Two of the 113th U.S. Open at Merion Golf Club on June 14, 2013 in Ardmore, Pennsylvania. (Photo by Andrew Redington/Getty Images)

U.S. Open - Round Two

ARDMORE, PA - JUNE 14: Phil Mickelson of the United States plays his tee shot on the ninth hole during Round Two of the 113th U.S. Open at Merion Golf Club on June 14, 2013 in Ardmore, Pennsylvania. (Photo by Ross Kinnaird/Getty Images)

U.S. Open - Round Two

ARDMORE, PA - JUNE 14: Phil Mickelson of the United States prepares to play his second shot on the fifth hole alongside Jim 'Bones' Mackay uring Round Two of the 113th U.S. Open at Merion Golf Club on June 14, 2013 in Ardmore, Pennsylvania. (Photo by Ross Kinnaird/Getty Images)

U.S. Open - Round Two

ARDMORE, PA - JUNE 14: Phil Mickelson of the United States hits his second shot on the 14th hole during Round Two of the 113th U.S. Open at Merion Golf Club on June 14, 2013 in Ardmore, Pennsylvania. (Photo by Ross Kinnaird/Getty Images)

U.S. Open - Round Two

ARDMORE, PA - JUNE 14: Nicolas Colsaerts of Belgium hits his tee shot on the fourth hole during Round Two of the 113th U.S. Open at Merion Golf Club on June 14, 2013 in Ardmore, Pennsylvania. (Photo by Andrew Redington/Getty Images)

U.S. Open - Round Two

ARDMORE, PA - JUNE 14: Charl Schwartzel of South Africa lines up a putt on the 12th hole during Round Two of the 113th U.S. Open at Merion Golf Club on June 14, 2013 in Ardmore, Pennsylvania. (Photo by Rob Carr/Getty Images)

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