Brooks Koepka is the defending champion at the WGC-FedEx St Jude Invitational -8 B Koepka (USA); -6 R Fowler (USA), B Todd (USA); -5 S Kang (Kor); -4 M Kuchar (USA), C Reavie (USA), M Homa (USA), J Thomas (USA) Selected others: -3 P Mickelson (USA), S Garcia (Spa), B DeChambeau (USA); -2 S Lowry (Ire), G McDowell (NI); Level J Rahm (Spa); +3 R McIlroy (NI)
World number six Brooks Koepka entered the joint best lap of his career to take a two-shot lead open on day one of the WGC-FedEx St Jude Invitational.
The four-time champion made nine birdies and a bogey in an eight under par 62 at TPC Southwind to lead Rickie Fowler and Brendan Todd.
Spanish Jon Rahm, in his first event since becoming world number one, finished level par after opening 70.
] Rory McIlroy, who can return to first place with a win, is left with three.
The Northern Irishman had five bogeys in Memphis, Tennessee, three in a row in front nine.
It was a return to form for Koepka, 30, who is struggling with a knee injury and has only one top 10 finish this season.
"It's all just the work we've done in the past three weeks with countless hours hitting balls and on the green," he said.
The American will go to the first major of the year at the PGA Championship as a defending champion next week.