Round 2 at Crowne Plaza Invitational at Colonial

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 shot an 8-under 62 to build a seven-shot lead heading into the weekend.
2 of 6 Hunter Martin/Getty Images
 fell out of contention after a 3-over 73.
3 of 6 Hunter Martin/Getty Images
 made two birdies and two bogeys for a 70.
4 of 6 Hunter Martin/Getty Images
 shot a bogey-free 64, but he's still eight shots off the lead.
5 of 6 Hunter Martin/Getty Images
 is one of four players tied for second place.
6 of 6 Hunter Martin/Getty Images
 made five birdies and four bogeys for a 1-under 69.