MARANA, Ariz. -- Shane Lowry found it difficult to come down from the high of knocking off top overall seed Rory McIlroy in Thursday's first round. Lots of phone calls, lots of text messages and finding it difficult to sleep.
But once Friday morning arrived, Lowry refocused, eventually knocking off Carl Pettersson 6 and 5 in the second round.
Lowry has now advanced farther than any previous 64th seed has in this tournament. The previous three times that the last seed knocked off the top seed were followed by second-round losses.
"To lose in the second round is not what I want coming here this week," the Irishman said. "I wanted to go on. I feel like I could potentially do very well in this tournament."
He certainly played very well Friday, a bogey-free 5 under through his 13 holes.
Pettersson, who earlier in the day finished the completion of his first-round win over Rickie Fowler, didn't play poorly but couldn't keep up. He parred his first eight holes and found himself 3 down at that point. He dropped the ninth hole with a bogey and suffered another bogey at the 12th. He never won a hole.
SCORECARD STATS: Lowry carded five birdies and no bogeys. Pettersson carded one birdie and two bogeys.
HOLES WON: Lowry won six holes. Pettersson did not win a hole.
NEXT OPPONENT: Lowry plays the Alexander Noren-Graeme McDowell winner in the third round of the Jones bracket.