Rory McIlroy won the Tour Championship and the FedEx Cup for the third time with his clubs after rallying from six strokes behind.
He finished with a 4-under 66 to overcome Masters winner Scottie Scheffler, who had a 73 with only one birdie.
McIlroy won the FedEx Cup in a playoff in 2016. In 2019, the first year of a staggered start, he won the FedEx Cup again.
"It's nice to finish the season on such a strong note," McIlroy said. "It was tremendously fulfilling to achieve something no one else had done... and to play golf when you needed to get the job done."
Scheffler, who started the week on 10-under courtesy to the season points lead and a staggered scoring system, was beaten by McIlroy, who shot the week's best 72-hole score of 17-under.
His Tour Championship triumph on Sunday, which guaranteed a third FedEx Cup title and the conclusion of the 2021-22 season, was enormously fulfilling for reasons other than the $18 million bonus he got.
Coming off a year in which the PGA Tour was embroiled in an ugly struggle with Saudi-funded LIV Golf, which has already recruited a dozen players and is now part of an antitrust case against the PGA Tour, this could have been the sweetest of the season.