Australian Steve Elkington has made a solid start to the Transitions Championship and trails little-known American leader Garrett Willis by three strokes after the first round.
Elkington hit a three-under-par 69 on the opening day, which included four birdies and just the one bogey at the 11th hole, to be equal eighth.
His compatriot John Senden is a shot further back in a tie for 12th on two-under and Mathew Goggin is the only other Aussie under the card at minus-one (equal 21st).
Willis, ranked 251st in the world and playing on a sponsor invitation, led after an opening 65 at Palm Harbour in Florida.
Told two weeks ago there was a place for him in the event, the 36-year-old Nationwide Tour graduate hit back from a 3rd-hole bogey with seven birdies on the par-71 Innisbrook course.
Willis ended the day two strokes in front of Swede Carl Pettersson, defending champion Retief Goosen and home quartet Jim Furyk, Jonathan Byrd, Jeff Maggert and rising star Rickie Fowler.
Maggert came into the field when Vijay Singh pulled out with a back injury.
England's Ross Fisher, playing only his fifth tournament this year, was in a share of second place with two to play, but failed to get up and down from a bunker at the short 17th and finished with a 68.
"I've been playing really well all year," said Willis, whose only PGA Tour victory came in Tucson nine years ago.
"I've made four out of five cuts and I really haven't capitalised on my play. I put myself in position a couple of times and slipped back."
His round included a chip-in three on the 10th which provided the spark for a back-nine 30.
Padraig Harrington, back from a St Patrick's Day dinner with President Obama at the White House on Wednesday evening, had an eventful end to his two-under 69.
After opening with 10 successive pars Harrington made a 38-foot putt for eagle on the next and chipped in from 50 feet at the 12th.
A six on the long 13th and another bogey at the 215-yard 17th sent him tumbling down the leaderboard, but he then holed a bunker shot for a closing birdie.
Scot Martin Laird had a one-under 71 and English pair Luke Donald and Brian Davis both signed for 71s too, but Ian Poulter and Justin Rose had disappointing rounds of 73.
Poulter, winner of the WGC Match Play in Arizona last month, is playing his last Tour event before next month's Masters, while former European No.1 Rose is hoping to climb into the world's top 50 in time for Augusta. He is currently 59th.
As for Japanese teenager Ryo Ishikawa, he crashed to a 12-over-par 83 on his return to America from his high school graduation.