The PGA Championship took place over four days at Quail Hollow in Charlotte, North Carolina, and while most of the spotlight was on world No. 1 Scottie Scheffler—who claimed his first PGA Championship title and third career major—there was also plenty of attention on this year’s Masters winner,

Rory McIlroy left the PGA Championship without a single word to the media on Sunday, leaving the golf world none the wiser as to the details of the reported failure of his driver to pass a conforming test earlier in the week.

The Northern Irishman went from favorite at Quail Hollow to struggling off the tee. It might be more than a coincidence.