Round 1 at 2012 Humana Challenge

1 of 13 Jeff Gross / Getty Images
Coming off the worst season of his career, Camilo Villegas fired a nine-under 63 to get atop the leaderboard.
2 of 13 Chris Carlson / AP
45-year-old David Toms birdied 18 to match Villegas's score and tie for the lead.
3 of 13 Chris Carlson / AP
Phil Mickelson (pictured here on the third green) is making his 2012 PGA Tour debut this week.
4 of 13 Chris Carlson / AP
Mickelson had an up-and-down round that included an eagle, a double bogey and a triple bogey.
5 of 13 Chris Carlson / AP
He finished at two over.
6 of 13 Stephen Dunn / Getty Images
56-year-old Greg Norman is making a rare appearance on the PGA Tour this week.
7 of 13 Stephen Dunn / Getty Images
Norman finished at even par on day one.
8 of 13 Chris Carlson / AP
21-year-old Bud Cauley shot a 66 that featured only one bogey.
9 of 13 Scott Halleran / Getty Images
Dustin Johnson made double bogey at 17 to finish at even par.
10 of 13 Jeff Gross / Getty Images
Kevin Streelman shot a two-under 70.
11 of 13 Jeff Gross / Getty Images
Brandt Snedeker put together a bogey-free 64 that left him one shot off the lead.
12 of 13 Ben Margot / AP
Charley Hoffman made four bogeys and six birdies for a score of 70.
13 of 13 Scott Halleran / Getty Images
Jhonattan Vegas had a solid round, finishing at two under.