Chad Campbell and Vaughn Taylor have taken a share of the lead after day one of the RBC Heritage in South Carolina.
The pair both hit rounds of 67 at Hilton Head's Harbour Town Golf Links to leave them on four-under-par.
Taylor's opening round was notable for a double bogey on the par-four ninth.
Jim Furyk and Harry English are one shot further back, while South Korea's Charlie Wi was the highest-placed non-American as he ended on two-under with seven others.
Elsewhere, world number one Luke Donald endured a tough day on the course as a round of 75 left him seven shots off the lead on four-over.
