Dustin Johnson shot 7-under 63 for his lowest round this year and grabbed a one-stroke lead Friday after 36 holes at the St. Jude Classic.
With a victory at TPC Southwind, Johnson would reclaim his spot as the world's top-ranked player going into the U.S. Open at Shinnecock Hills. He had four of his seven birdies and an eagle on his back nine for a 29 and finished with a 10-under 130 total.
Ryan Blaum and Andrew Putnam each shot 64 and were tied second, and C.T. Pan (65) and Wesley Bryan (66) followed at 8 under. Brandt Snedeker shot his best round this year with a 62 that was one stroke off the course record. He was at 7 under.
Seamus Power, who came in with a one-stroke lead, shot a 69 to reach 6 under.
Two-time defending champ Daniel Berger (71-141) missed the cut.
... Two-time champion Anna Nordqvist shot a 5-under 66 for a share of the first-round lead with Laura Diaz and Celine Herbin in the ShopRite LPGA Classic.
Lydia Ko, In-Gee Chun and ANA Inspiration winner Pernilla Lindberg were at 67 with Sandra Gal, Su Oh, Beatriz Recari, Amy Yang and Wayne, N.J., native Marina Alex. Defending champion I.K. Kim had a 68.
Shanshan Feng, at No. 4 the top-ranked player in the field, shot 69.