Jimmy Walker takes a one-shot lead into the second round of the US PGA Championship

The Irish players struggled on the opening day at Baltusrol

Jimmy Walker takes a one-shot lead into the second round of the US PGA Championship

Picture by: Tony Gutierrez / AP/Press Association Images

American Ryder Cup player Jimmy Walker has taken a one-shot lead into the second round of the US PGA Championship as Baltusrol in New Jersey.

The 37-year-old shot a -5 first round of 65, to lead from the trio of Emiliano Grillo, Ross Fisher and former champion Martin Kaymer.

Walker has struggled in the previous three majors this year. A T29 finish at The Masters was the only time he has made the weekend after missed cuts at the US Open and The Open Championship.

Henrik Stenson, who won his first major only a fortnight ago is in a group of  four players on -3, two shots behind Walker. Reigning champion Jason Day lies a shot further back on -2/

It was a very disappointing day for Ireland's five golfers, with none of them failing to make level par. Padraig Harrington, the 2008 champion is the best of the Irish on +1, with Shane Lowry a shot further back.

The Northern Ireland trio of Darren Clarke, Rory McIlroy and Graeme McDowell are all on +4. Both McIlroy and McDowell failed make a birdie in the round, as they struggled on the Baltusrol greens.

McIlroy was not the only star to struggle. US Open champion Dustin Johnson looks set to miss the cut. Only five players shot a worse round as he shot a +7 round of 77.