World number one Luke Donald and Rory McIlroy are in contention at the halfway stage of the Memorial Tournament at Muirfield Village.
Englishman Donald is four shots behind leader Steve Stricker after a second round 69 left him on five under, alongside McIlroy who shot a 72.
Northern Ireland's McIlroy was joined on six under by Ricky Barnes, Jonathan Byrd, Rod Pampling and Josh Teater.
American Stricker continued his fine form with a 67 after his opening 68.
That round, which included a hole in one on the par-three eight, as well as five birdies and two bogeys, saw him move three clear of the field on nine under.
On his hole in one, Stricker said: "It's a shock when you see that go in, obviously. But in a good way! It was a great way to finish the round."
McIlroy looked brilliant at times and made six birdies, giving him 13 through two rounds at Muirfield Village. But he also had four bogeys and a sloppy double bogey on the 14th hole.
"I felt as if I played good enough to shoot something in the 60s, but I just made too many mistakes out there," said the Northern Irishman.
Donald's round was slightly less erratic as he struck seven birdies and four bogeys in his round of 69.
After finishing his second round strongly with two successive birdies, the 33-year-old said: "I played a lot of solid golf, so I'm doing a lot of good things.
"I've made some careless mistakes out there, mostly short game mistakes. This is the first time in a while I've played rough that is this long and gnarly and I'm struggling a little bit with it.
"Even [on Thursday] I finished strongly, four birdies out of the last five, and I did something similar today. Obviously a lot of positives and I'm still in a great place for the weekend."