Luke Donald returned to the head of the leaderboard with a third-round 66 at the Honda Classic.
That was enough to give the Englishman a share of the lead alongside Mark Calcavecchia and Matt Jones at six-under-par.
Donald - who last won at this event two years ago - led after a first-round 64, before a 74 on Friday saw him slip off the pace.
But he was back in the groove on Saturday during a bogey-free 18 holes that featured two birdies on each half of the course.
The Hertfordshire golfer picked up strokes at the fifth and eighth during a front-nine of 33, and then made another move late in the day with successive birdies at the 16th and 17th.
"There's a lot of danger out there," noted Donald.
"There's some very daunting shots, a lot of scary shots with a lot of water around. So you have to really stand up there and hit good, solid shots.
"It was nice to come back and have a good chance tomorrow."
Also at six-under is American veteran Calcavecchia, who birdied three of his first four holes during a round of 67.
And Australian Jones - playing in the final group - birdied the 18th for a 71 to join Calcavecchia and Donald.
Donald's fellow Englishman Brian Davis, the half-way leader, signed for a 73 to slip back into a two-way tie for fourth at five-under with Jose Coceres (68).
World number four Ernie Els, the highest ranked player in the field, recorded a second consecutive level-par 70 to remain on the fringes of contention in a five-man group at three-under.