Before the PGA Championship at Quail Hollow Club, the USGA declared the drivers of Masters champion Rory McIlroy and World No. 1 Scottie Scheffler nonconforming during routine testing. Scheffler, who won his third major with a five-stroke victory, noted he had anticipated the testing results given his driver had been in use for over a year. The PGA of America requested this driver testing to ensure compliance with regulations, which focuses on the club's spring-like effect that can change as the club ages.
The driver testing is something that regularly happens on tour," Scheffler said. "My driver did fail me this week. We had a feeling that it was going to be coming because I've used that driver for over a year.
McIlroy, who tied for 47th at 3 over in the PGA Championship, left Quail Hollow on Sunday without talking to reporters for the fourth straight day.
The PGA of America requested the USGA conduct driver testing at Quail Hollow, it said in a statement. "That program is consistent with the same level of support that we provide to the PGA Tour as part of their regular program for driver testing."
Drivers faces tend to "creep" or thin the more they're used by golfers, giving them even more spring.
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