Louis Oosthuizen finished on No. 9 by holing a bunker shot for a birdie.
"He's going to play it from here!" said FOX Sports' Shane Bacon. He'll start the day at 1 over, which is now the cut line.
No player has ever won the U.S. Open after winning a PGA Tour event the previous week.
Instead, Koepka opted for a shot with his feet above his ball, which was lying precariously on the cart path.
What prevented this from being better was the one hole Woods couldn't save himself on.
He didn't lose the ball.
Despite the battle Woods had to go through to get to the one-under, he has to be happy with the result. "I tried to miss the ball in the correct spots, and a couple of times where I had wedges in my hand I was just dumping, center of the green, move on, get my 30-, 40-footer and move on about my business and take my medicine when I was in a bad spot".
Where: Pebble Beach Golf Links (Pebble Beach, Calif.).
"The only reason I knew my putt on the last was to match Tiger's score is that Rickie had that putt earlier and I was watching some of the (television) coverage", Rose said. "Got over the lip and hit the rake".
Koepka enters this tournament as the No. 1 golfer in the world.
After two rounds on the opposite end of the spectrum, we'll see if Woods can put it all together Saturday in Round 3 at Pebble Beach. Yet after an eventful first round there he was perched just four strokes off the lead.
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What's next: Tiger goes again with Rose and Jordan Spieth at 11:24 a.m. ET on Friday.
But only 17 players were under par in the first round of 2000. "It was just one of those days". He was four shots behind.
After a double bogey at the fifth hole, Woods was able to erase his mistake with back-to-back birdies on his next two holes to get back into red numbers.
Defending champion: Brooks Koepka.
However, Shane Lowry had an opening day to forget.
Second round play began in cool temperatures under overcast skies and players were taking advantage of the soft greens at Pebble Beach. Dustin Johnson, Rory McIlroy, Justin Rose and Woods round out the top five in order.
Viktor Hovland of Norway loves Pebble Beach.
By comparison his tie for 16 at Pebble Beach probably feels like a reason to sleep easy. He is leaving Oklahoma State to turn pro and will make his debut next week at the Travelers Championship in CT. McIlroy is in second (2,112) followed by Koepka (1,863).
A dry forecast for the U.S. Open doesn't mean dry conditions at Pebble Beach. And even if they do it's not like they're overly firm right now, especially with the fog and mist coming in in the morning.
Justin Rose tries to build on his record-tying 65 from the first round that gave him a one-shot lead. Brooks Koepka opened with a 69.
Phil Mickelson, who is seeking his first U.S. Open victory in his 28th start to complete the career grand slam, didn't open the way he wanted.