Graeme McDowell and Jose Maria Olazabal remained two under par after eight and seven holes respectively as the weather improved at Royal Portrush for the Irish Open.
Padraig Harrington was still one under, but Mark Foster became outright leader when he picked up further strokes at the sixth and seventh.
On four under the Worksop golfer was one ahead of Northern Irishman Michael Hoey and Australian Matthew Zions.
For the third time in under two months European Ryder Cup captain Olazabal was paired with Scot Paul Lawrie, close to securing a place in his team for September's match. The former Open champion parred his first six holes.