Round 2 at 2011 St. Jude Classic

1 of 5 Sam Greenwood/Getty Images
 shot a 5-under 65 for a three-shot lead heading into the weekend.
2 of 5 Sam Greenwood/Getty Images
 made four birdies, two bogeys and a double bogey.
3 of 5 Sam Greenwood/Getty Images
 shot an even-par 70 to finish at 1 over par.
4 of 5 Sam Greenwood/Getty Images
 shot a 2-over 72 to make the cut on the number.
5 of 5 Jeff Roberson/AP
 is tied for second place, three shots behind Karlsson.