ARDMORE, Pennsylvania (AP) ― Even for Phil Mickelson, his path to the top of the leaderboard Thursday in the U.S. 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 U.S. Open.

Mickelson returned from his daughter’s eighth-grade graduation about 3 1/2 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.