USA's Jason Dufner, left to right, Keegan Bradley, Phil Mickelson and Zach Johnson make their way off the fifth tee during a practice round at the Ryder Cup PGA golf tournament Wednesday, Sept. 26, 2012, at the Medinah Country Club in Medinah, Ill.

USA's Jason Dufner, left to right, Keegan Bradley, Phil Mickelson and Zach Johnson make their way off the fifth tee during a practice round at the Ryder Cup PGA golf tournament Wednesday, Sept. 26, 2012, at the Medinah Country Club in Medinah, Ill.