Updated

A glance at Thursday's key hole at the U.S. Open:

HOLE: No. 1

YARDAGE: 520

PAR: 4

STROKE AVERAGE: 4.6

RANK: 1

KEY FACTS: Leader Michael Johnson bogeyed the hole, which played as a par 4 the last time the Open was held at Olympic Club. The other five players under par all managed to make par on the hole, which played toughest on the day.