Koepka's dramatic PGA Tour return explained: How has he been punished?

Brooks Koepka being welcomed back to the PGA Tour will divide opinion within the golfing world, but why has he been allowed to return after leaving LIV Golf and what does it mean for the sport?

source https://www.skysports.com/golf/news/12040/13493500/brooks-koepkas-pga-tour-return-explained-how-liv-golf-departure-led-to-new-returning-member-program