K.T. Kim of South Korea and Lee Westwood currently hold a share of the lead at -4.
Westwood is through 12 holes and has birdied his last two, the Par-5 No. 2 and the par-4 No. 3. Kim just birdied No. 16, what seems to be very playable hole today.
The leaders in the clubhouse are Car Pettersson and Retief Goosen, who each shot a three-under 67. Goosen overcame an early double-bogey on No. 3 and has birdied six holes for the day. Pettersson played a bogey-free round until his last hole of the day, No. 9.
Bubba Watson, Charl Schwartzel and Luke Donald are all at -3.
Sergio Garcia is -2 through 13. Adam Scott, last year's winner, is at even par after 14 holes.