Graeme McDowell and Matt Every both carded a first-round 66 to take a share of the lead on day one of the RBC Heritage.
McDowell got off to a rotten start in South Carolina after bogeying the first as the Northern Irishman bids for a second title on Hilton Head Island.
However, the 2010 US Open champion responded with six birdies over the next 17 holes to finish up on five-under-par, level with Every.
The American would have taken a slender one-stroke lead in Friday's session, but a five on the par-four last scuppered his chances of a bogey-free round.
Sangmoon Bae sits one stroke further back in second, with Kevin Kisner, Scott Langley, Morgan Hoffman, Matt Kuchar - who won it last year - and Cameron Smith in a five-way tie for third on three-under.
England's Ian Poulter is one of 13 players one shot further back on two-under-par.
