Jason Dufner holed out from 176 yards on the 18th hole for an eagle, and then added three more birdies on the front nine at Muirfield Village for another seven-under-par 65, giving him the 36-hole scoring record at the Memorial and a five-shot lead going into the weekend.
He was at 14-under 130, one shot better than the record previously held by Rickie Fowler (2010) and Scott Hoch (1987). Neither wound up winning the tournament.
Daniel Summerhays made bogey on his last hole and shot 69 to finish five shots behind Dufner. Fowler (66) was another shot behind.
Jordan Spieth was one shot out of the lead after the opening round. He already was eight shots back when he teed...