Shane Lowry and Graeme McDowell are tied-third after carding five-under par rounds of 66 on the opening day of the RBC Heritage in South Carolina.
The Irish pair are among six players who are joint third following Thursday's round, with Mito Pereira, Corey Connors, Patrick Cantlay and Sepp Straka also on five under.
Lowry began his round on the 10th and finished his front nine with three consecutive birdies from 16-18 before further birdies on the 2nd and the 5th.
