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

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 failed conformance tests at the PGA Championship. Could YOU be using an illegal ...

According to a report, the Masters champion had his regular driver deemed non-conforming Tuesday and had to put a backup in play at Quail Hollow.

RORY McILROY had his favourite driver snatched away from him at the USPGA Championship because a random test showed it broke ...

"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.

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

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

Rory McIlroy's PGA Championship performance overshadowed by driver controversy. USGA's non-conforming ruling led to equipment ...

McIlroy’s driver was reportedly ruled non-conforming on Tuesday at the PGA Championship, and three days later McIlroy had hit just 10 fairways through 36 holes.

The USGA and PGA of America stayed true to its policy of not disclosing the names of players who failed this week's driver ...

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