Scheffler joins Tiger as repeat winner at Memorial

"It's always a hard week," said Scheffler, who finished at 10-under 278.

"We battled really hard on the weekend. Overall it was a great week."

On one of the tougher PGA Tour tests of the year, Scheffler made one bogey over the final 40 holes at Muirfield Village.

"Well, you did it again," tournament host Jack Nicklaus told him walking off the green.

Ben Griffin tried to make it interesting at the end on Sunday with a 12-foot eagle on the par-5 15th and a 25-foot birdie putt on the par-3 16th to close within two shots with two to play. Scheffler, however, doesn't make mistakes. Griffin made double bogey on the 17th.

Griffin (73) made a par on the 18th to finish alone in second, worth $US2.2 million ($A3.4 million), more than what he earned when he won at Colonial last week.

Austrian Sepp Straka (70) finished another shot back.

"You know Scottie's probably going to play a good round of golf. The guy's relentless. He loves competition, and he doesn't like giving up shots," Straka said.

"But it's one of those courses where it can always happen, so you got to be prepared for it. I felt like I gave myself a lot of chances to kind of make a push."

Scheffler now has won three times in his last four starts — the exception was Colonial, a tie for fourth the week after winning the PGA Championship — and expanded his margin at No.1 in the world to levels not seen since Woods in his peak years.

Woods is a five-time winner at Memorial who won three straight from 1999 through 2001. No one had repeated at Muirfield Village since then until Scheffler.

It was Scheffler's fifth victory in a $US20 million ($A31 million) signature event in the last two years.

This one ended in a handshake with Nicklaus, who had said earlier in the week of Scheffler, "He plays a lot like I did."

Australians Adam Scott and Min Woo Lee finished well off the pace. Scott's final-round 72 left him five over while Lee (75) was another five shots adrift.