Tiger Woods made no attempt to hide his frustration, after two late bogeys left him nine shots behind leader Gary Woodland in the US Open.
Woodland (-9) holds a two shot lead over 2013 champion Justin Rose after the American carded a six-under par 65.
2010 Open champion Louis Oosthuizen is a further shot back at six under.
Woods was on course for a first bogey-free round in any US Open, since his closing 67 sealed a record 15-shot win at Pebble Beach in 2000, when he carded one birdie and 15 pars in his first 16 holes on Saturday (NZT).
But the 43-year-old then dropped shots on the eighth and ninth to card a highly disappointing 72, and leave himself with an uphill task over the weekend to claim a 16th Major title.
Asked afterwards if he was "steaming", Woods told reporters: "Yeah, I am... not a very good finish.
"Yeah, I'm a little hot right now. I just signed my card about a minute ago, so need a little time to cool down a little bit.
"I had a couple of opportunities there, but overall, I kept leaving myself above the hole.
"And unlike yesterday, when I missed it, I missed in the correct spots below the hole. Today, I never had that many looks from below the hole and the one I did have, I made at 11."
Despite the poor finish, Woods has not given up hope of adding a fourth US Open victory to the Masters title he won at Augusta National in April.
"Right now, I'm still in the ball game," he added. "There's so many guys with a chance to win.
"We've got a long way to go and, you know, we'll see how it shapes up for tomorrow.
"The golf course can be a little bit faster, a little bit more springy than it was today, and scores will continue to back up a little bit.
"They've got it [the course] right where they want it. It's just a matter of how much will it dry out from morning to afternoon. The fairways were a bit slow and soft. I don't think they put mowers on them this morning.
"And the short areas, the run-ups, man, they're firm. So if they get the greens anywhere like that, it will be a hell of a test."