First Round of the Barclays

1 of 7 Mel Evans/AP

First Round of the Barclays Hunter Mahan grabbed the early lead with a nine-under 62.

2 of 7 Mike Ehrmann/SI

Phil Mickelson made four birdies and three bogeys for a 70.

3 of 7 Mike Ehrmann/SI

"My one-under par round is not as good as I thought it would be, but I thought I played well and I'll take it," Mickelson said.

4 of 7 Mike Ehrmann/SI

Padraig Harrington made two birdies, a bogey and a double bogey for a 72.

5 of 7 Chris Condon/PGA TOUR/Getty Images

Adam Scott shot an opening-round 68. He is six strokes off the lead.

6 of 7 Mike Ehrmann/SI

Kenny Perry shot a two-under 69.

7 of 7 Sam Greenwood/Getty Images

Paul Casey is alone in second at five under par.