Australians John Senden and Nick O'Hern continued their climb up the leaderboard, but it is American Jim Furyk who leads the way at the Transitions Championship in Florida.
Senden fired a five-under-par round of 66 to move to six under overall, alongside O'Hern - who carded a 67 - in a tie for ninth place, five shots behind Furyk.
Geoff Ogilvy shot the equal-best round of the day, 65, to move up to four under and a tie for 18th place, while Greg Chalmers is a further shot back.
Mathew Goggin is at two under, while James Nitties and Steve Elkington are both at one under.
Furyk went round in four-under-par to move to 11-under for the tournament at the Copperhead course in Palm Harbour.
He picked up birdies at the first, 11th, 12th and 15th holes as he added to his earlier rounds of 67 and 68.
South Korea's KJ Choi, South African Retief Goosen, American Bubba Watson and Swede Carl Pettersson were in a four-way tie for second on eight-under.
Choi also fired a 67, while the other three had to make do with rounds of 70.
England's Luke Donald was another to go round in 67 as he moved to seven-under overall, level with Jeff Maggert of the USA and Ireland's Padraig Harrington.
It would have been even better for Donald, who picked up six birdies, had he not bogeyed the 18th.
Harrington, who began the day top of the leaderboard, had a disappointing day as his one-over 72 dropped him down the field.