Retief Goosen retains the lead going into the half-way stage of the final round at the US Open at Southern Hills.
The South African is on six under after seven, and is on one under for the day.
American Stewart Cink lies in second, on four under, while his compatriot and world number two Phil Mickelson lies in third on three under after eight.
Meanwhile, Padraig Harrington is on four over for the day on the 17th. He currently lies on eight over for the tournament.
Darren Clarke finished the tournament on eight over, with a final round of two over.