American veteran Hale Irwin has finished the first round of the US Open on three under par with an opening round of 67.
In-form German Bernhard Langer is also on three under but still has six left to play.
Tiger Woods has begun his defence of the Open with pars on the opening two holes but has dropped a shot on the third.
Ireland's Padraig Harrington is currently on three over after 17, while Darren Clarke is five over after 11.