"Money isn't going to change my life," Koepka said at the time.
The proposed rival league was different from LIV Golf, presented as the "Premier Golf League" though still relying on Saudi Arabia's sovereign wealth fund. Greg Norman and LIV Golf took the idea of 48-man fields, no cuts with a team component.
LIV Golf has not announced Koepka's signing amid speculation that a few others were soon to join. ESPN Deportes reported over the weekend that Abraham Ancer of Mexico also was signing. Ancer is No. 20 in the world with one PGA Tour victory.
Koepka gives LIV Golf a big name with his four major titles — back-to-back in the U.S. Open (2017-18) and PGA Championship (2018-19), though his game has been in decline since then because of a series of injuries.
His last victory was the Phoenix Open in February 2021 and he has fallen to No. 19 in the world. In the majors this year, he missed the cut at the Masters and has finished out of the top 50 in the PGA Championship and U.S. Open.