Lowry drifts back into the pack at Hilton Head

American Stewart Cink has five-shot lead heading into final round at Hilton head

FOCUSED: Ireland's Shane Lowry lines up a putt during the third round of the RBC Heritage at Harbour Town Golf Links in Hilton Head Island, South Carolina.

Ireland's Shane Lowry fell back into the pack with a one-over 72 as American veteran Stewart Cink continued his from-the-front form at the RBC Heritage at Harbour Town links in Hilton Head. 

Despite a couple of momentum-building early birdies, Lowry failed to make a run on the tournament leaders and a double bogey at the par three 4th saw the Offally man's progress stall.