Number of consecutive weeks that the No. 1 spot in the Official World Golf Ranking has changed. With Monday’s updated ranking, England’s Justin Rose, who hasn’t played in the past two weeks, returned to No. 1, bumping American Brooks Koepka, who finished 12th in the Dunlop Phoenix Tournament in Japan, to No. 2. A week earlier, Koepka had ended Rose’s one-week reign. All told, the top of the ranking has changed six times in the past 11 weeks. The OWGR uses a sliding scale of points based on tournament results and strength of schedule in a revolving two-year window. American Charles Howell III, who won the PGA Tour’s RSM Classic, improved 23 spots, to No. 61. Mexican Abraham Ancer, who won the Emirates Australian Open, jumped from 96th to 60th. England’s Danny Willett reversed a nearly two-year slide, vaulting from No. 276 to No. 90 after his victory in the European Tour’s season-ending DP World Tour Championship.