Shane Lowry was second at 11 under after a 5-under 65, and Sepp Straka (67) was another stroke back. Defending champion Rory McIlroy shot a 3-under 67 and was tied in a large group for fourth. Get the latest D-FW sports news, analysis and opinion delivered straight to your inbox. Plus, Kevin Sherrington's A La Carte.

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;