Offaly's Shane Lowry carded a 3 over round of 74.
It was a disappointing start for the Irish on day one of the RBC Heritage on the US PGA Tour in South Carolina.
Shane Lowry carded a 3 over round of 74, with Rory McIlroy 1 over and Graeme McDowell 4 over par.
The lead is shared on 7 under by Mark Hubbard and Ian Poulter.
World number one Rory McIlroy felt he never got it going.