The amazing run continues for the 43-year-old Glover, who two weeks ago was No.112 in the FedExCup and preparing for an early end to his season. Now he is assured the FedExCup finale and perhaps consideration for the Ryder Cup.

Australia's Cam Davis and Hideki Matsuyama of Japan also had reason to feel like winners on Sunday. Both played their way into the top-50 in the FedExCup. That gets them into the BMW Championship next week, and it assures them a spot in the $US20 million ($A31 million) signature events next year.

Davis, the 28-year-old Sydneysider, closed with a bogey-free 67 to finish 11-under and joint-sixth with six others.

“I would say the last three Sundays in a row have all been about the same level of stress and the same level of achievement for me,” Davis said.

“I've managed to put really good clean rounds together when the pressure has been on to keep moving forward, and yeah, it's really satisfying to be able to know that I've got a tee time next week, so I can start looking forward to that.”

Matsuyama, who has made it to the Tour Championship each of his nine years on the PGA Tour, amazingly has a chance to extend the streak.

He was at No.57 in the FedExCup and was in a tie for 38th going into the final round and only two-under for his round after a birdie at the 15th. And then came the 90-minute storm delay.

RIGHT: Cam Davis kept his Playoffs alive with a top-10 and will tee it up next week with Jason Day. PHOTO: Andy Lyons/Getty Images.

"I looked and saw what I needed to do on the final three holes. I knew I had to birdie them all," Matsuyama said.

He hit 6-iron to 10 feet for eagle on the par-5 16th. He holed a 12-foot birdie putt on the 17th and then he made a superb up-and-down from behind the 18th green for par and a 65. That was just enough to crack the top-50 and send him to Chicago.

Glover made a 20-foot par putt, a 30-foot bogey putt and a 12-foot par putt over the final six holes to close with a one-under 69 and force a play-off with Cantlay, who surged into contention with a 64 at the TPC Southwind.

The play-off effectively ended with one shot. Cantlay's 3-wood that was about a foot from being perfect instead ended in the water. Glover found the fairway and two-putted for par. Cantlay took a penalty drop and his 20-foot par putt just slid by the right edge.

"Whether you're fighting something or playing great, you just work hard. You never know when it can turn. And it's turned very quickly for me." – Lucas Glover.

Glover becomes only the third player in his 40s to win back-to-back weeks on the PGA Tour over the last 25 years, joining Kenny Perry (2003) and Vijay Singh, who did it three times, most recently in the FedExCup Playoffs in 2008.

"Whether you're fighting something or playing great, you just work hard. You never know when it can turn," Glover said.

"And it's turned very quickly for me."

Glover goes to No.4 in the FedExCup after starting this week at No.49 and has made just short of $US5 million ($A7.7 million) in the last two weeks. As for the Ryder Cup? Glover would need to win the BMW Championship to have any chance of earning one of six automatic spots.

RELATED: Inside Glover's winning bag

Rory McIlroy (65) birdied the last and tied for third with Tommy Fleetwood (68), who had a birdie chance on the 18th to join the play-off.

Taylor Moore (71) started one shot behind Glover, but bogeyed three of his first four holes and finished fifth, while Jason Day finished in a share of 52nd and advances through to BMW Championship in 21st.