American Brandt Snedeker charged into the hot seat after an impressive third round at the US PGA Tour Championship.
Snedeker shot a bogey-free six-under 64 to move to eight-under, tied for the lead with Englishman Justin Rose (68).
They have a two-shot buffer over Ryan Moore (65) at six-under and are three clear of world No 1 Rory McIlroy (68), Masters champion Bubba Watson (70) and veteran Jim Furyk (72).
Should Snedeker go on to win, he would pocket the tournament trophy and the FedEx Cup, as well as around US$11.4 million ($13.7 million) in prize money.
"It was probably one of the best rounds I've played this year," Snedeker said.