Graeme McDowell four behind in Heritage event at the Hilton Head

Graeme McDowell trails leader Charley Hoffman by four shots going into Sunday's final round of the Heritage event at Hilton Head.

The former US Open champion from Portrush is joint fourth on seven under after firing a three-under-par 68 in the third round in South Carolina.

McDowell carded four birdies with the only blemish a bogey at the third hole.

Luke Donald posted a 71 to remain five under while fellow Englishman Brian Davis is three under after a 70.