But if you're looking to try to narrow things down a bit, it makes sense to look at patient, calm, in-form players with solid putting strokes and a mastery of the short game. So four names who cover at least most of those bases are: Johnson, 2011 Masters champion Charl Schwartzel, Jason Dufner -- a two-time winner on the PGA Tour this season --and world No. 1 Luke Donald.
They may finish as the top four, they may miss the cut. It's not often that picking the top-ranked player is high risk, but then this is the U.S. Open at Olympic.