Britain's Luke Donald recovered from a poor second round to share the lead going into the final round of the Honda Classic in Palm Beach Gardens, Florida.
Donald, Australian rookie Matt Jones and American Mark Calcavecchia, a former two-time winner, ended the day six under par.
Donald, the first-round leader, forced his way back to the top of the leaderboard after a 74 a day earlier.
Donald's superb putting saw him compile a four-under-par 66, the 30-year-old's second bogey-free round of the week. 'I was a bit disappointed after the second round,' Donald was quoted as saying on the BBC website.
'I had one really bad hole on 14 so it was nice to bounce back and play very solid today.'