Viktor Hovland is 18 holes away from a $US18 million ($A28 million) cheque and the FedEx Cup trophy.
The Norwegian holds a six-stroke lead over Xander Schauffele after the third round of the Tour Championship on Saturday at East Lake Golf Club in Atlanta, Georgia.
"The list of names that's been on that trophy is pretty special," Hovland said.
"It feels more like a sprint. Obviously, it's a marathon getting into this week. But it's hard to win the FedEx Cup if you haven't played well the last few weeks."
Hovland, 25, won last week's BMW Championship to move to second in the FedEx Cup points standings in time for this week's "staggered start" format.
His rounds of 68-64-66 have vaulted him to 20 under overall.
Hovland began the day tied for the lead with Collin Morikawa.
After playing the first 36 holes pretty much error-free, Morikawa made two bogeys and a double to card a 73, dropping back to a tie for third with Keegan Bradley (70) at 13 under.
An unexpected 75-minute suspension because of a nearby lightning storm did not zap Hovland's momentum.
He came out of the delay with birdies at holes 12 and 13 to build up a seven-shot advantage.
Schauffele's 68 was his 27th consecutive round of par or better at East Lake.
His stellar form aside, Hovland's lead is not impenetrable.
Just last year, Rory McIlroy came back from six down in the final round to beat Scottie Scheffler for his third FedEx Cup title.
Morikawa wasn't the only big name who moved backwards on Saturday.
World No.1 Scheffler had four bogeys and didn't make a birdie until the final hole for a 73.
After starting the week in first place at 10 under, Scheffler is tied for fifth at 11 under with Wyndham Clark (68) and Jon Rahm of Spain, who had a double bogey on No.8 en route to a 71.
McIlroy posted a 71 and is part of a tie for eighth at nine under with Patrick Cantlay (68) and Adam Schenk (69).
A four-over 74 on Saturday left Australia's Jason Day tied with Jordan Spieth in 27th place, even after 54 holes.