Rory McIlroy’s first round at the PGA Championship was a struggle. It was also a learning experience.

Rory McIlroy struggled with wayward tee shots in a four-over par 74 start Thursday at the PGA Championship, then was asked to describe his frustrating round at breezy Aronimink.

Rory McIlroy’s first round at the PGA Championship was a struggle. It was also a learning experience.

The Masters champion hit just five of 14 fairways Thursday at Aronimink and bogeyed his last four holes.