Dustin Johnson of the USA (L) celebrates his birdie putt on the 17th green with Fred Couples during day two of the Afternoon Four-Ball Matches for The 39th Ryder Cup at Medinah Country Club on September 29, 2012 in Medinah, Illinois. (Photo by Ross Kinnaird/Getty Images)
Dustin Johnson of the USA (L) celebrates his birdie putt on the 17th green with Fred Couples during day two of the Afternoon Four-Ball Matches for The 39th Ryder Cup at Medinah Country Club on September 29, 2012 in Medinah, Illinois. (Photo by Ross Kinnaird/Getty Images)