Graeme McDowell finished with a bogey on his final hole of the day, missing a 10-foot par putt on the par-4, 505 yard ninth hole, to finish the second round with a three-under 68 for the day, and three-under for the tournament.
He currently holds a two-stroke advantage over Paul Casey, Ernie Els - who birdied the 7th and is at three-under on the day - Dustin Johnson and others set to tee off shortly.
Others that just completed the second round include Alex Cejka, who shot one-over 72 and will head to the clubhouse tied for ninth.
Shaun Micheel entered the day tied for the lead, but had a nightmare front nine (his back nine) bogeying five holes to finish the day at five-over 76 and three-over for the tournament.
