Rory McIlroy declined to speak to the media for the fourth day in a row at the US PGA Championship, as he finished outside of ...

USGA driver testing has been a big topic this week, and Xander Schauffele threw more fuel on the fire on Sunday ...

Rory McIlroy and Scottie Scheffler's drivers were deemed "nonconforming" during a standard test earlier this week at Quail ...

Why was Rory McIlroy's driver non-conforming, what is the process for testing on tour and what does it all mean? Let's ...

Rory McIlroy and Scottie Scheffler's drivers failed conformance tests at the PGA Championship. Could YOU be using an illegal ...

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

"I think, if we're going to do it, we might as well do it right, get more robust and get even more strict,” Scheffler said.

McIlroy's driver is believed to have been deemed non-conforming Tuesday. When reached for comment, the USGA confirmed testing ...

The PGA of America says Rory McIlroy was part of some 50 players who had drivers tested before the PGA Championship.

CHARLOTTE - Rory McIlroy, off to a slow start in the PGA Championship at Quail Hollow Club in Charlotte, reportedly is using ...

The USGA tested Rory McIlroy's driver and concluded that it did not meet established standards, forcing him to change it ...

Rory McIlroy switched TaylorMade driver heads this week ahead of the PGA Championship. The reason why is unclear.