The U.S. Open is known as the toughest test in golf, and it usually lives up to its reputation.
Some years more than others.
Oakmont proved to be downright painful to Phil Mickelson. He injured his left wrist during long practice rounds chipping out of the rough. A lasting image of the U.S. Open is players in the rough with grass covering the tops of their shoes, and sometimes the cuffs on their pants. The rock-hard greens. The narrow fairways. Geoff Ogilvy once said the hardest part of the U.S. Open was going over par early in the round and wondering if you'll ever get back to even.
An even tougher test is trying to narrow down the five toughest U.S. Opens held in...