US Open champion Rory McIlroy was five shots off the lead on two under par after the first round of the Wells Fargo Championship in Charlotte, with North Carolina's Webb Simpson leading a group of three on seven under.
Simpson shot a 65 to sit alongside fellow Americans Stewart Cink and Ryan Moore.
Simpson's round, played in the company of Tiger Woods, was highlighted by an eagle at the par-four eighth and also contained six birdies as well as a single bogey.
With four bogeys and three birdies, Woods could manage only a one-under 71.
Cink was flawless with seven birdies in his round of 65, while Moore managed nine birdies against two bogeys.
A shot behind in a group of five players on six under were Rickie Fowler and England's Brian Davis, while Lee Westwood's round was spoiled by a double bogey at the 16th and a single at 18 which left him one under alongside Woods.
Defending champion Lucas Glover was level par, as was Scotland's Martin Laird.