Patrick Reed holds a one-shot lead heading into the weekend at the US Open after a chaotic second round in windy conditions at a tricky Winged Foot.
Bryson DeChambeau eagled his final hole to set the target at three under par early on and then watched as many of his challengers crumbled in New York.
But fellow American Reed birdied the last as he scrambled to four under par.
Overnight leader Justin Thomas fell back with a three-over 73, while Rory McIlroy is seven adrift after a 76.
Thomas started the second round on five under but had four bogeys and a double bogey before a couple of birdies in his closing holes lifted him to two under.
Re-live the action live from day two
Northern Ireland’s McIlroy, chasing his fifth major and first since 2014, started the day two shots off the lead and birdied the first. But seven bogeys and a double bogey followed as he dropped away to three over par.
World number one Dustin Johnson is also at three over after dropping two shots in his final three holes in a level-par 70. (BBC)