Billy Horschel admitted on Friday that he doesn't know what his zone is. It wasn't seven pars in a row, or 18 straight greens in regulation.
"I wasn't in the zone, I was just focused on what I tried to do. I didn't know I hit every green until I walked off 18," Horschel admitted. "It's a cool thing, but like I said, it's not the first time I've hit all 18 greens. I've done it plenty of times in my career."
He may have done it plenty of times, but never in a major before. That's because this is just his second major. He missed the cut at Winged Foot in 2006.
What else happened there? Horschel's co-leader, Phil Mickelson, blew the lead on the final hole of regulation. That led to this great Mickelson quote, "I am such an idiot."
Well that same idiot is tied for the lead after two rounds at a championship which he has finished second at five times.
With some long holes down the stretch, could this be another Winged Foot?
TWO AMATEURS IN THE HUNT
There are 10 amateurs in the field this week at the U.S. Open. Two of them are right in the mix with the second round suspended by darkness.
Chinese Taipei's Cheng Tsung Pan was bogey-free in his second round through nine holes to move to even-par for the championship. He birdied the second and fifth to go with seven pars.
"I played great this afternoon. I didn't hit my driver well, I hit a couple of fairways out there. But I ground it out just trying to make par and make tons of par putts, which are really important for me," said Pan, who is tied for third place. "That makes all the difference."
One shot behind him is University of California standout Michael Kim. He was also 2-under for his round through 11 holes.
Kim won both the PAC-12 Player of the Year award and the Jack Nicklaus Award as the collegiate Player of the Year thanks to his 11 tournament victories.
He tripped to a bogey at 14, but came back with a birdie on the 16th to get back to plus-3. Kim parred his next two, then birdied the first and second to move into a share of eighth at 1-over par.
Kim parred the third before play was called for the night.
* With the second round suspended due to darkness, it will resume on Saturday at 7:15 a.m. (ET).
* There were 244 birdies in the second round versus 627 bogeys. The scoring average with a little over half the field completed was 75.17.
* To this point in the championship, there have been 591 birdies and eagles, and 1,626 bogeys or worse.
* The par-4 first has averaged 4.00 to this point in the championship.
* The par-3 13th continued to be the easiest hole as it played to an average of 2.99 in round two, and was the only hole that average under par in that round. The 13th has been the easiest of the week, averaging 2.85 through a round and a half.
* The par-3 ninth was the hardest hole in round two as players averaged 3.63 strokes. The par-4 18th has been the hardest overall, as players have averaged 4.71 strokes there.