McIlroy in frame in Boston

Rory McIlroy remains in the hunt at the Deutsche Bank Championship in Boston after shooting a level-par round of 71 on Friday.

The Northern Irishman recovered from a disastrous start to the day - he bogeyed the 11th and triple-bogeyed the 12th, his second and third holes after he started on the 10th tee - but four birdies saw him claw his way back into contention.

The lead is shared by American duo Ryan Moore and James Hahn while Paul Casey heads the chasing pack after firing a round of 68, which featured eight birdies and three bogeys.

"It was just some solid golf," Moore said after carding a bogey-free 66. "I didn't do anything too crazy.

"I drove it okay, hit some nice irons, gave myself some nice opportunities. The few times I was out of position, I hit a couple of great chip shots to recover and made a couple of great pars when I needed to."

Graeme McDowell carded a three-over-par 74 while fellow Ryder Cup reject Russell Knox also failed to show European Ryder Cup captain Darren Clarke what he is missing by signing for a 73.

Adam Scott and Jim Furyk are among 13 players who sit two shots behind the leaders while Dustin Johnson, Jordan Spieth, Henrik Stenson and Justin Rose lie a further stroke adrift.

Stenson was forced to withdraw from The Barclays last weekend and admits his knee is still causing him trouble.

"We're not at race speed at moment," he told Sky Sports. "I'm pretty exhausted, to be honest.

"The knee was okay, I had a little twitch before I went out but didn't feel too bad out there. I got a small tear in the meniscus, which I'll just have to monitor over time and just see if it gives me enough grief to have another procedure.

"([I also have a] sore throat, low energy levels and I was playing not even up to average, but a good putter kept it together, I'd say."