Even for Phil Mickelson, his path to the top of the leaderboard on Thursday in the US Open was unconventional.

He traveled about 2,400 miles in the air and 7,000 yards on the ground. He took a short nap on his private jet from San Diego and another one during a rain delay when he found a secluded corner of the library room in the Merion clubhouse. He carried five wedges but no driver.

Some 17 hours later, Mickelson had a 3-under 67 to match his best opening round in the US Open.

Mickelson returned from his daughter's eighth-grade graduation about three and a half hours before his tee time. He three-putted his first hole for a bogey and didn't give back a shot the rest of the day at Merion, which proved plenty tough by yielding only one other round under par to the 78 players who completed the first round.

Because of two rain delays, the first round won't be completed until Friday morning. Mickelson won't have to tee it up again for another 24 hours.

Enough time to fly back to San Diego?

"I don't want to push it, no," Mickelson said with a tired smile.

Tiger Woods faced a tougher road. He appeared to hurt his left hand after trying to gouge out of the deep rough on the opening hole. He grimaced and shook his left wrist again after hitting a 5-wood out of the rough on the fifth hole. He already had three bogeys though five holes before starting to make up ground with a 50-foot birdie putt on the par-4 sixth hole.

Woods, however, failed to take advantage on the short stretch of holes in the middle of the round, and he was shaking his hand again after shots out of the rough on the 10th and twice on the 11th. He was 2-over for his round and had a 4-foot par putt on the 11th when play was stopped for the day.

"I've got a lot of holes to play tomorrow," Woods said. "And, hopefully, I can play a little better than I did today."

Luke Donald was 4-under through 13 holes, making one last birdie before leaving the course. The first round was to resume at 7:15 am Friday, and the forecast called for drier weather for the rest of the week.

Masters champion Adam Scott, playing with Woods and Rory McIlroy, was 3-under through 11 holes, while defending US Open champion Webb Simpson was 2-under through eight holes. McIlroy was even par.

Lee Westwood got the full Merion experience. He was 3-under when his approach on the 12th hit the wicker basket - the signature at Merion, replacing traditional flags - and bounced off the green, leading to a double bogey.

For Mickelson, this could be the start of yet another chance to win the major championship he wants so dearly. Or maybe he's setting himself up for more heartache. He already has been a runner-up a record five times in the US Open.

"If I'm able - and I believe I will - if I'm able to ultimately win a US Open, I would say that it's great," Mickelson said. "Because I will have had ... a win and five seconds. But if I never get that win, then it would be a bit heart-breaking."

It doesn't take much - just two holes for Sergio Garcia, who found Merion far more daunting than the few wisecracks from the gallery.

Garcia received mostly warm applause, with some barely audible boos from the grandstand when he started his round on No 11. It was his first time competing in America since his public spat with Woods took a bad turn when he jokingly said he would have Woods over for dinner during the US Open and serve fried chicken.

"There were a couple here and there," Garcia said about the jeers. "But I felt the people were very nice for the whole day. I think that almost all of them were behind me and that was nice to see."