Scottie Scheffler propelled himself into the lead at the Memorial Tournament thanks to a sizzling back nine showing on Saturday.

The world number one, fresh from triumphing at the PGA Championship, went into the turn six shots behind.

Yet four birdies across the last five holes saw him card a four-under par 68, and he is now one shot ahead of Ben Griffin, who missed a routine putt on the 18th.

Scheffler, who went bogey free across his third round, is hunting his third victory in the space of four tournaments.

"I was definitely proud of the way I finished, and it was really challenging," he said.

"Around this golf course, even par, I think, today would have been a pretty solid score.

"I felt like I could have got a little bit more out of the round, but I felt like I was playing nice and just a couple lips here and there would have changed the score a little bit.

"This golf course is really challenging and no lead's safe around this place. I knew if I kept going and played a decent round, I would be in somewhat of a position to chase him down."

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Griffin, though, is not deterred ahead of Sunday's final round at Muirfield Village.

"Obviously, Scottie Scheffler's the best player in the world, but the number one can be beat," Griffin said.

"I beat him last week. Obviously, he's coming off a major win. But, yeah, I feel like he obviously can be beaten, and I've just got to keep the pedal down and make a lot of birdies because I know he's going to, as well."

Nick Taylor, who is third, three shots back after going round in 74, still holds out hope, too.

"It's a tough golf course. I'll be trying to chase him down," Taylor said.

"[Scheffler's] obviously playing phenomenal, so I'll have to play some of my best golf to be in the hunt there with the last few holes to go. But it is playing so difficult that being a few under early will get me back in there."