McIlroy shot an opening 4-under 66 that featured six birdies and long drives. "I certainly can tidy a few things up," he said, "but overall a decent day.”

Rory McIlroy is returning as the defending champion at the Truist Championship, previously the Wells Fargo Championship; the reigning Masters champion will chase more major success at the PGA Championship this month;

The Masters champion opened with a 66 at the Philadelphia Cricket Club as Keith Mitchell set the pace with a course record 61.