Two bogeys and a double bogey down the stretch for Jason Dufner capped a disappointing first day for the Cleveland native. At 2-over, Dufner sits eight shots back of leader Carl Pettersson.
The Swedish native had six birdies today and is currently a shot better than the rest of the field.
In the clubhouse a shot back of Pettersson are Rory McIlroy and Gary Woodland.
There are many familiar faces at the top of the leaderboard, as well. John Daly finished his day at 4-under while Tiger Woods is in contention at 3-under.
About half of the field is still on the course finishing their first round.
PGA.com has an updated leaderboard available here.