(Reuters) - Phil Mickelson gave his focus a thumbs up after carding four-under-par 66 to trail clubhouse leader Seamus Power by one stroke at the FedEx St. Jude Classic in Tennessee on Thursday.
A week before trying to complete the career grand slam at the U.S. Open, Mickelson became ragged off the tee late in his round but avoided any damage at TPC Southwind in Memphis.
"I finished the round off, even though I didn't quite have it there at the end," Mickelson told PGATour radio. "I had a nice simple round going and then I missed the last four fairways.
"I was able to gather myself well and control my thoughts a little bit better."
Mickelson, 47, said after a first round 74 at last week's Memorial that his focus had been lacking, but he subsequently gathered himself to tie for 13th.
By playing in Memphis, Mickelson is continuing his traditional build-up for the U.S. Open, before which he usually likes to play two weeks straight.
A six-times U.S. Open runner-up, he has had three chances since winning the 2013 British Open to become the sixth player to complete a career grand slam, but he has not come close.
He even skipped last year's event - won by Brooks Koepka at Erin Hills - to attend his daughter's high school graduation.
Koepka matched Mickelson's 66 on Thursday, saved by a putter that was almost as hot as the Memphis weather.
"I didn't play well at all," he said. "We were all over the place. I'm a good putter. I just need to figure out everything else."
Power, an Irishman who went to university in Tennessee, capped off his day by hitting his approach shot to five feet for a birdie at the last.
He headed a logjam of seven players by one group with half the field back in the clubhouse.
Power, 31, is in his second season on the PGA Tour.
(Reporting by Andrew Both in Cary, North Carolina, editing by Larry King)