PGA Tour rookie Shawn Stefani never came close to making a bogey until his final hole Thursday in the Tampa Bay Championship in Palm Harbor, Fla.
Stefani rolled in a par putt from just under 5 feet to complete a 6-under 65 and take a two-shot lead over Brian Harman.
"Kind of fought through a couple of bad shots coming in -- or not so great shots -- and managed to get balls up-and-down and make a few putts," said Stefani, 31, who placed 16th on the Web.com Tour money list in 2012. "So all in all, it was a great day."
Harris English finished on the 18th and like Stefani, hit into a bunker. Except he three-putted from 40 feet for a double bogey and a 68, tied with Brendan Steele and Tag Ridings.
Former Cal star Peter Tomasulo, Geoff Ogilvy Lucas Glover, Vijay Singh and K.J. Choi were among eight players at 69.
Defending champion Luke Donald opened with a 70 despite being 4 under with four holes to play.
John Daly shot a 72.
LPGA Tour: Ai Miyazato took the LPGA Founders Cup lead on a hot afternoon in Phoenix, playing a late four-hole stretch in 5 under for a 9-under 63.
Returning from a whiplash injury sustained in a five-vehicle crash after a tournament in Thailand three weeks ago, Miyazato birdied the par-3 14th, sank a 20-foot eagle putt on the par-5 15th and added birdies on the par-4 16th and par-3 17th for a two-shot lead over Jee Young Lee.
Candie Kung, Brittany Lang, Gerina Piller and Pornanong Phatlum shot 66s.