June 4 (Reuters) - Jason Dufner was on the verge of a stunning victory at the Memorial tournament when lightning stopped play late in the final round in Ohio on Sunday.
Dufner had a two-shot lead with one hole left, but play was halted moments after his drive at the par four 18th settled into thick rough at Muirfield Village.
He was 13-under, with fellow American Rickie Fowler in second place at 11-under, also playing the last.
Fowler, however, split the fairway with his drive up the 18th.
It was not confirmed when play would resume.
The only other player in contention was Daniel Summerhays, three shots behind with three holes left.
Six players had yet to finish.
A day after shooting a miserable 77 to fall from a five-shot lead to four strokes behind on Saturday, Dufner roared back in the final round.
He nervously coaxed a three-foot birdie in the side door at the par-four 17th but his work was not done.
Reporting by Andrew Both in Cary, North Carolina; Editing by Ian Ransom