Phil Mickelson got off to a poor start, going three over for his first six holes.
2 of 10John Biever/SI
Vijay Singh, the 2000 champion, finished at even par after a one-under 71.
3 of 10Simon Bruty/SI
Padraig Harrington birdied the first three holes on the way to a 68, one of only three rounds Friday under 70. Paul Casey also shot 68, and Jerry Kelly fired a 69. Harrington is one over for the tournament.
4 of 10Simon Bruty/SI
Paul Casey made eagle on the par-5 second hole.
5 of 10Simon Bruty/SI
Tiger Woods also had a rocky start, bogeying the first hole.
6 of 10Simon Bruty/SI
Jim Furyk was even par through the first 11 holes, until a bogey on No. 12. He finished at two over par.
7 of 10John Biever/SI
After a birdie on eight, Mickelson finished the front nine at six over par.
8 of 10Al Tielemans/SI
Brett Wetterich shot one-over-par 73 on Friday and is tied for the lead with Tim Clark.
9 of 10Robert Beck/SI
Justin Rose fell two strokes back from the lead after a three-over-par round Friday.
10 of 10Simon Bruty/SI
Woods said he strained himself while trying to stop his swing when a bird flew over his head on No. 13.