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 switched drivers at the PGA Championship after his original driver was rumored to be deemed non-conforming by the USGA. CHARLOTTE, N.C. – Is the reason that Rory McIlroy switched drivers this week because it was deemed non-conforming by the USGA during random club testing?

It was the first meeting between the two major winners after Bryson DeChambeau said Rory McIlroy wouldn't talk to him at the Masters.