FORT WORTH, Texas — Jason Bohn, Jeff Overton and Blake Adams shot 7-under 63s on Thursday to share the first-round lead at the Colonial, where 2008 champion Phil Mickelson's return turned into a struggle after an impressive start.
Mickelson birdied the first two holes, but that was the lowest he got on a hot day with ideal scoring conditions. At 1-over 71 he is tied for 89th, while 75 players were under par.
It will take quite a comeback for Mickelson to win his third Colonial, a victory that would push him to No. 1 in the world ranking ahead of Tiger Woods for the first time. He has work to do just to make the cut and participate in the tournament's second "Pink Out" during the third round Saturday.
Mickelson wasn't at a pink-swathed "Hogan's Alley" to defend his title last May after finding out that his wife had breast cancer. That is when the Colonial had its first "Pink Out" to honor Amy Mickelson and raise awareness of the disease.
Overton shot his career-best round after being even through seven holes. Bohn had his season-best round despite congestion so bad that he couldn't hear out of his left ear.
After Mickelson blasted from a greenside bunker to 10 feet for a birdie at the opening par-5, 565-yard hole, he put his drive at the dogleg-right 389-yard second hole 50 yards from the pin and pitched to 8 feet for a birdie.
Walking off the No. 3 tee box after another impressive drive, Mickelson was flashing the thumbs-up sign.
By the time he knocked in a bogey putt at No. 18, Mickelson was shaking his head trying to figure out what happened. The Masters champion hit five of 14 fairways and missed six greens.
"There's no excuse. There's no wind, the golf course is in perfect shape, and there were a lot of scores out there," Mickelson said. "I just wasn't one of them."
Brian Davis was fourth at 64 despite a swollen face from an abscess inside his mouth.
There was a group of nine at 65, one shot better than John Daly, who had his first bogey-free round in two years. Defending champion Steve Stricker shot 68.
champions: Robin Freeman shot 6-under 66 for a share of the first-round lead at the 71st PGA Senior Championship at Colorado Golf Club.
Two-time Masters champion Bernhard Langer also took advantage of an early tee time before the winds whipped up and dried out the greens, firing 66 on the piney private course in Parker.
Tom Lehman was the notable exception among the leaders, teeing off in the afternoon and carding 68, tied with Brad Bryant.
Paul Azinger withdrew due to the flu.