Rory McIlroy is 5 off the lead on 1 over after a first round 72 at Quail Hollow.
Graeme McDowell ended 2 over.
Padraig Harrington carded four double-bogeys in a disastrous 8-over par round of 79.
Shane Lowry fared slightly better, with a 3-over 74.
America’s Kevin Kisner and Denmark’s Thorbjorn Olesen share a one shot lead on 4 under.