South Korea's KJ Choi, seeking his first US PGA victory in three years, fired a five-under par 67 on Saturday to share the lead after three rounds at the Greensboro Chrysler Classic.
Choi and American DJ Trahan enter the final round on 16-under par 200 at the 4.6 million-dollar tournament, one stroke ahead of Japan's Shigeki Maruyama and American Jason Bohn and two strokes ahead of England's Justin Rose.
Choi birdied the par-3 fourth and par-4 seventh holes then added back-to-back birdies at the par-3 12th and par-5 13th before closing a bogey-free day with a birdie at the 16th and a pair of pars.
Choi won in New Orleans and Tampa Bay in 2002 but has not won a US PGA title since. His best finishes this season were shares of eighth place at Bay Hill and the Memorial, but a victory would help Choi recapture his top form.
The 37-year-old Korean lives near Houston and his house escaped damage from Hurricane Rita.
Trahan opened with a birdie, followed up with 11 pars in a row, then fired three birdies and an eagle over the final six holes.
The US PGA rookie one-hopped his 8-iron approach from 165 yards into the cup at the par-4 16th to sandwich an eagle between birdies and share the lead in quest of his first PGA victory.
Trahan had a season-best ninth-place at Charlotte, North Carolina, in May but has not cracked the top 20 in nearly three months.