The American achieved his second consecutive victory in this LIV tournament on Sunday in Jeddah in Saudi Arabia after beating his compatriot Talor Gooch in a playoff.
But Gooch, who scored 62 shots in the third and final round, had the biggest smile as he was crowned the series’ best player and banked an enormous bonus of $18 million (about R341 million).
Koepka earned $3 million (almost R56 million) with his first place.
Koepka and Gooch both finished at -14, with Harold Varner III, Sergio Garcia and Scott Vincent tied for third at -12.
South Africa’s Charl Schwartzel and Dean Burmester both finished at -7, with Louis Oosthuizen at -5 and Branden Grace at -3.
The South African Stingers team finished ninth, but collected enough points to finish fifth overall in the series.
The teams will now play in a final tournament in Miami this coming weekend to divide another enormous bonus pot between the teams.
The top four teams (4 Aces, Crushers, Torque and Range Goats) get to pick their opponents first, after which it’s the Stingers’ turn to decide their opponents.
* In the US PGA Series’ Shriners Children’s Open decided in Las Vegas, South Korea’s Joo-Hyung Kim completed the final round in 66 shots and finished at 264 (-20) to walk away with first prize money to walk
Kim was followed by Adam Hadwin of Canada at 265 (-19), with the Americans JT Poston and Eric Cole, another Canadian Taylor Pendrith and Henrik Norlander of Sweden together third at 266 (-18).
South Africa’s Erik van Rooyen (270, -14), Garrick Higgo (275, -9) and Christiaan Bezuidenhout (278, -6) also shared in the prize money.
* In the European Series and DP World Tour’s Spanish Open played in Madrid, South Africa’s Zander Lombard shot 64 in the fourth round to finish second on 265 (-19).
Lombard finished four strokes behind winner Matthieu Pavon of France, who finished at 261, 23 under par.
The Englishman Nathan Kimsey was third on 266 (-18), with Marcel Siem of Germany, who scored 61 shots in the final round, and another Frenchman, Fabrizio Zanotti, who finished fourth on 267 shots (-17).
Of the other South Africans, Wilco Nienaber finished on 272 (-12), followed by Thriston Lawrence and Louis de Jager (both 276, -8), Daniel van Tonder (279, -5), Thomas Aiken (280, -4 ) and Deon Germishuys (288, +4).