WGC-CA Championship at Doral, Round 2

1 of 8 Scott Halleran/Getty Images
fired a six-under 66 to grab the lead by one stroke.
2 of 8 Scott Halleran/Getty Images
was feeling good after an ace on No. 13. But he bogeyed his last hole of the day to finish one behind Els.
3 of 8 David Walberg/SI
made two birdies and a bogey for a 71.
4 of 8 Scott Halleran/Getty Images
made only one bogey in his round of four-under 68.
5 of 8 David Walberg/SI
tumbled down the leaderboard after a 78.
6 of 8 David Walberg/SI
Poulter's fans were easy to spot in the gallery.
7 of 8 Marc Serota/Getty Images
eagled the first hole, but he gave the strokes back with a double bogey on the par-5 12th. He finished with a two-under 70.
8 of 8 Scott Halleran/Getty Images
struggled on Nos. 17 and 18, making a bogey and a double bogey.