American Stanley and 19-year-old Chilean Niemann sit at 11 under.
Tiger Woods is having quite a comeback season. He had to settle for a 70 and made the cut on the number.
The biggest casualty to miss the weekend was three-time major victor Jordan Spieth who finished three over, after adding a 72 to his first round 75.
Woods made Muirfield Village sound like a rock concert until storms arrived.
So Woods, who hit 9-of-14 fairways and 14-of-18 greens Friday, will begin his third round Saturday six shots behind Stanley, who shot 66, and Niemann, who shot 68.
Stanley had eight birdies in his six-under par 66 and he and Niemann were two strokes in front of South Korea's An Byeong-hun, who signed for a 67 for 135.
In nod to India, US military renames its Pacific Command
Admiral Phil Davidson replaced Admiral Harry Harris as Commander, US Indo-Pacific Command or IndoPacom. Davidson had in April described the Indo-US relationship as a "historic opportunity".
Ticketfly, Major Venues Offline Hours After Hack, Ransom Demand [UPDATE 3]
Out of an abundance of caution, we have taken all Ticketfly systems temporarily offline as we continue to look into the issue. The site's abrupt downtime caused issues with bars and event organizers selling tickets through the Ticketfly service.
Florida Jury Awards Family Of Man Killed By Police $4
Monique Davis, Hill's fiancee, walked out of the courtroom when she heard the amount of the award, according to NBC. Phillips lamented that the jury sent the message that they "viewed these childrens' pain as virtually worthless".
Jason Day found himself in a foreign place on his home course at the Memorial - atop the leaderboard.
After hitting his second shot on the par-5 just inside 100 yards, Woods holed out his third shot for eagle - and the crowd went insane.
From 95 yards, Woods hit a low, flighted wedge that landed just past the pin on the right before spinning back down the slope towards the hole.
At least Woods is in contention. "It could have been easily a nice little 62 or 63", said Woods who finished the day with a five-under total of 139.
"I missed a lot of short putts, which is something I don't normally do, which is just frustrating, " he said. Check in for highlights from every tournament plus player interviews, player profiles, tournament previews, swing analysis and all the greatest shots and awesome moments.
"I've got to clean that up come this weekend and hopefully I can get it going and I can play well like this on the weekend and I've got a great chance of winning this tournament".