The American closed with an eight-under 64 in Mississippi on Sunday to clinch a two-shot victory. 

Fisk and South African Garrick Higgo finally separated themselves over the closing holes at the Country Club of Jackson on Sunday, and they put on quite a show.

They were tied when Fisk missed a five-foot birdie putt on the par-4 15th. That turned out to be his last mistake.

He holed a 40-foot birdie putt on the 16th, and Higgo said he heard someone in the crowd say, "Take that, Higgo." 

The South African answered with a 12-foot birdie of his own - his fourth in a row - and playfully put his finger against his lips with a smile.

Fisk hit wedge that danced around the cup and settled a metre away on the 17th. Higgo answered again with a wedge to just outside a metre. It appeared as though it would go down to the wire, except Higgo's short birdie putt caught the left lip.

Fisk pulled one ahead with the birdie, then left no doubt with an approach to four feet for one final birdie to win by two shots.

"I came out today with an attitude that nothing was going to stop me," Fisk said during his Golf Channel interview on the 18th green. 

"I just felt like I'd be standing right here, right now, before the round started. I know I'm good enough. I thought I could do it."

And he did, finishing at 24-under 264 for a win that carries big benefits for the 28-year-old.

Fisk was No.135 in the FedEx Cup standings, destined to return to the Korn Ferry Tour unless he made up ground in the remaining two months of the Fall Series. Only the top 100 at the end of the season keep full cards.

He now has a two-year exemption through 2027, after it took him five years to get to the tour. 

"To have some job security is pretty nice," Fisk said. "It's been a long, hard year."

Higgo looked to have taken himself out of the mix with a bogey-bogey start to the back nine. But then he ran off four straight birdies to catch Fisk, and was poised to make it five  until the short miss at the 17th.

"My mindset was to birdie every hole," Higgo said. "I almost did that. Steven did the same, so hats off to him."

Danny Walker was tied for the lead early on the back nine, but hit it into the water on the par-5 11th and made bogey, then drove into a hazard on the 17th that led to another bogey. 

Walker shot 69 and tied for third with Vince Whaley (67) and Ryder Cup player Rasmus Hojgaard, who had a 66-65 weekend.