Rory McIlroy lies three shots off the lead at the US PGA at after a four under par 68 on day two at Whistling Straits.
The 21-year old is currently tied for third on -5, three shots behind clubhouse leader Matt Kuchar, who holds a one shot lead from fellow American Nick Watney.
Dense fog interrupted proceedings for the second day in a row at the Wisconsin course, with half the field yet to complete their second rounds.
Darren Clarke lies on level par after a two under par 70 on the second day and he is joined on level par by Padraig Harrington, who battled back from a disappointing 75 on the opening day and is -3 for his second round with twelve holes yet to play.
World number one Tiger Woods is on -1 after six holes of his second round, while Graeme McDowell (+3) and Shane Lowry (+6) look set to miss the cut, which is projected to be +1.
