Rory McIlroy posted a first round of 70 at the Truist Championship as he began his challenge to win at Quail Hollow for a fifth time.
The 37-year-old from Northern Ireland made 17 pars before his only birdie of a one-under round came at the 18th hole.
American Matt McCarty set the early pace with an eight-under-par 63 at the event in Charlotte.
England’s Harry Hall managed six birdies and one bogey as he ended the opening round with a five-under 66.
Compatriots Tommy Fleetwood, whose round included an eagle on the 10th, and Alex Fitzpatrick, fresh from securing tour membership, are on four under after 67s.
England’s Matt Wallace and Justin Rose both signed for level-par rounds of 71, while Scotland’s Robert MacIntyre was two over with one to play when play was halted late in the evening because of inclement weather.
The tournament is the last event before the US PGA Championship takes place at the Aronimink Golf Club in Pennsylvania from 14-17 May.