A day after the completion of a wild 2018 U.S. Open, the U.S. Ryder Cup points standing underwent an equally wild shakeup on Monday, with a new occupant in every spot in the top five.At the top of that shakeup is new leader Brooks Koepka, who finished 1-over par at Shinnecock Hills in Southampton, N.Y., to win his second consecutive U.S. Open. He earned 4,320 Ryder Cup points with the win (nearly doubling his season total) to jump four spots to No. 1.Koepka also vaulted five spots to No. 4 in the world golf rankings.Patrick Reed, who had a solid fourth-place showing at Shinnecock, fell from the top spot to No. 3 in the Ryder Cup team points. World No. 1 Dustin Johnson, who finished one shot better than Reed in third place, moved up from third to second in the standings.Justin Thomas (who fell from No. 2 to No. 4 after tying for 25th) and Jordan Spieth (No. 4 to No. 5 after missing the cut) round out the top five. Rickie Fowler (tied for 20th) and Bubba Watson (also missed cut) remain in sixth and seventh, respectively, while Webb Simpson’s top-10 showing at Shinnecock moved him into the eighth — and final guaranteed — position in the standings.The previous holder of the No. 8 spot, Phil Mickelson, fell to No. 10 after a U.S. Open that included a penalty for striking his putt while it was still moving in the third round. The display drew plenty of attention, as well as numerous calls for him to withdraw from the tournament. He rebounded with a 1-under 69 on Sunday to finish tied for 48th at 16-over 296.Bryson DeChambeau remained at No. 9 after tying for 25th at the Open.Zach Johnson made the highest jump of any player in the top 25, climbing from 26th to 21st after tying for 12th with an 8-over 288.