( CNN ) -- Sweden 's Carl Pettersson and Tiger Woods were neck and neck as the second round of the U.S. PGA Championship at Kiawah Island , South Carolina drew to a close on Friday . Pettersson , who posted a six-under par round of 66 on Thursday , made a shaky start to his second round collecting two bogeys in the opening three holes , before hitting back with three birdies . But further bogeys in the closing holes checked his progress once again allowing the more consistent Woods to edge closer to the top of the leaderboard . Earlier , Fiji 's Vijay Singh posted a round of 69 to finish on four-under par leaving leave him well placed to mount a challenge at the weekend . England 's Ian Poulter was also four under with a handful of holes to complete . Northern Ireland 's Rory McIlroy finished the day two-under for the tournament after shooting a disappointing three-over par round of 75 . Adam Scott is one shot further back after posting the same score , while Phil Mickelson is on even-par after firing a one-under par round 71 . John Daly slipped down the leaderboard into a tie for 16th on Friday . The 1991 champion finished with a five-over 77 , one place ahead of 2008 champion Padraig Harrington who struggled to a 76 . Luke Donald 's quest for a first major looks like it will have to wait until 2013 after a second round 76 left him on six-over par and in danger of missing the cut . Early exits are also expected for Spain 's Sergio Garcia who finished seven-over par , Lucas Glover and current U.S. Open champion Webb Simpson . It was also day to forget for American club professional , Doug Wade , who could n't have imagined things could get much worse than his opening round 83 . They did . The club professional from Dayton , Ohio slumped to a 21-over par 93 on Friday -- one short of the all-time high score at the tournament .
Tiger Woods in contention for his fifth U.S.PGA title after consistent showing in round two . Swede Carl Pettersson has a erratic round at Kiawah Island after opening with 66 on Thursday . The 1991 champion John Daly slips down leaderboard after posting a five-over 77 .