The Golf Blog says: Jason Dufner vaulted to the top of the leaderboard after a 7-under 63 to finish 9-under after the second round.
Dufner (course record): "The history of the game is something that's near to my heart. Mr. Hogan and Mr. Strange are good company to be in."
— PGA TOUR (@PGATOUR) August 9, 2013
Leaderboard
Jason Dufner -9
Adam Scott, Matt Kuchar, Jim Furyk -7
Justin Rose, Henrik Stenson -6
Robert Garrigus, Steve Stricker -5
Webb Simpson, Martin Kaymer, Charley Hoffman, Marcus Fraser -4
Sergio Garcia, Roberto Castro, -3
Rory McIlroy E
Tiger Woods +1
Phil Mickelson +2