In his career, Phil Mickelson has finished in the top ten at the U.S. Open a whopping ten times without a single win. A look at the chart below shows just how much Mickelson struggles on Saturday and Sunday at the national championship.
In U.S. Open tournaments in which Mickelson has finished in the top ten, he has averaged a very good 0.6 strokes below par in the opening round. However, as the tournament progresses, Mickelson's average goes up, until he is averaging 2-over in the final round.
For comparison, Tiger Woods has been far more consistent during his eight top-ten finishes. Tiger's worst round is only 1.1 strokes worse than his best round, while Mickelson's final round averages 2.6 strokes worse than his opening round...
Data via databasegolf.com and ESPN.com