(CNN) -- Brian Gay holds a one-stroke lead going into the final round of the St Jude Classic despite taking a bogey on the final hole at TPC Southwind, Memphis.
Gay continues to lead the way after a third round four-under-par 66 at the St Jude Classic.
The American, who has led from the opening round, is seeking his second PGA Tour victory of the season after winning the Verizon Heritage in April by a remarkable 10 shots.
Gay's 18th hole bogey, the only one on his third round card, gave him a four-under-par total of 66, to move onto 14-under-par for the 54 holes.
Compatriot Bryce Molder lies second on 13-under-par after a birdie at the last gave him a 65, while Australia's Robert Allenby is a further two shots behind following a 68.
The trio will play together on Sunday in the final group with the field divided again into threesomes with more severe weather forecast in Tennessee.
Another American, Paul Goydos, is in fourth place on 10-under following a second consecutive round of 64, while his compatriots Woody Austin, Heath Slocum and Vaughn Taylor are all on nine-under with two-time winner David Toms and Bob Estes lying a shot behind them.
Sweden's Fredrik Jacobson will start the final round as the leading European on a day when Ryder Cup stars Padraig Harrington, Sergio Garcia and Henrik Stenson all missed the halfway cut after the completion of the weather-delayed second round.
Jacobson is eight shots off the pace in a tie for 10th place on seven-under-par following a third-round 67 while Northern Ireland's Graeme McDowell shot a one-under 69.
That got him to four under and in a tie for 23rd place alongside world number two Phil Mickelson, who endured a bumpy, three bogey, two birdie front nine on the way to two-under-par 68.
Mickelson, returning to the Tour for the first time since his wife Amy was diagnosed with breast cancer, said he was looking for a little more momentum on Sunday as he prepared for next week's US Open.
"I want to get out tomorrow and get a hot hand," Mickelson told reporters. "I feel like I've been hitting some good shots but haven't been following up with many putts. If I can make some putts, it will give me momentum heading into next week."