American J.B. Holmes is the first-round leader at The PGA Open Championship in Northern Ireland.
Holmes carded a five-under 66 Thursday at Royal Portrush, one shot better than Ireland's Shane Lowry.
13 golfers, including American Brooks Koepka and Spain's Jon Rahm, are two back at -3.
Tournament favourite Rory McIlroy struggled to an eight-over 79, his second highest score ever in a major championship.
Tiger Woods shot a +7 78.