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

Scottie Scheffler confirmed that his driver also was deemed non-conforming by the USGA, which conducts the testing for the PGA of America, before teeing it up in the 107th PGA Championship. Scheffler’s fellow competitor Xander Schauffele first told reporters of Scheffler’s failed test earlier in the day.