Five players hold the clubhouse lead after shooting 5-under 67s on Thursday in the incomplete first round of the fog-affected Ballantine's Championship.
Jean Baptiste Gonnet, Johan Edfors, Kieran Pratt, Matthew Baldwin and Kim Gi-wang are leading after fog engulfed the Blackstone course to force a delay of 2 hours, 10 minutes. Half the field will complete their rounds early Friday.
Former British Open champion Louis Oosthuizen is a stroke back with two holes to play.
Oosthuizen, who won the 2010 British Open at St. Andrews, topped the leaderboard at 6 under before dropping a stroke on his last two holes.
Y.E. Yang of South Korea, who became the only Asian-born player to win a major at the 2009 PGA Championship, shot a 70.