The simple but demanding test that Quail Hollow requires is a familiar one for many players at this 107th PGA Championship, especially Rory McIlroy.

Rory McIlroy has already won four times at Quail Hollow, the site of this year's PGA Championship. Justin Thomas revealed his secret to success.

In addition, the two-time PGA Championship winner owns a sparkling 69.48 scoring average at Quail Hollow, and since his first appearance there, McIlroy has put up a cumulative score to par of -102 through 50 rounds, per Justin Ray of Twenty First Group. To compare, Rickie Fowler is next best with a -47 through 45 rounds.