Round 2 at 2012 Zurich Classic

1 of 6 Chris Graythen / Getty Images

Jason Dufner made five birdies and an eagle to grab a one-shot lead heading into the weekend.

2 of 6 Stan Badz/PGA Tour/Getty Images

Defending champion Bubba Watson birdied No. 17 to make the cut.

3 of 6 Chris Graythen / Getty Images

Ernie Els is two shots back after a four-under 68.

4 of 6 Gerald Herbert/AP

Rickie Fowler shot a seven-under 65 to move into contention.

5 of 6 Chris Graythen / Getty Images

Greg Chalmers's wild round included nine birdies, three bogeys and an eagle on a par 4.

6 of 6 Chris Graythen / Getty Images

K.J. Choi shot a four-under 68.