A look at the key hole Saturday at the U.S. Open:

Hole: 9

Par: 4

Yardage: 487

Rank: 5

Scoring Average: 4.26

Key fact: Leader Shane Lowry made a birdie there to finish off a front-nine 33, while his closest pursuer, Andrew Landry, made bogey, one way to account for the two shots that separate them.