The win was Rose's second worldwide this year and fourth in the last 16 months. The Englishman has been a fixture in the top 10 since his U.S. Open victory in 2013, spending only two weeks outside it, earlier this spring, in the more than two years since hoisting the trophy at Merion.
Across the globe in Las Vegas, Smylie Kaufman fired a final-round 61 at the Shriners Hospitals for Children Open to outlast the field and pick up his first PGA Tour win in only his fifth start. In one week, Kaufman moved 151 spots, from 226th to 75th, as his friend, last year's Web.com Tour money leader and Shriners runner-up Patton Kizzire, jumped from 102nd to 76th. Both players started the year tied at the bottom of the world ranking, No. 1548, and are now well inside the top 100 thanks to four combined victories in 2015.
Speaking of runner-ups, despite his struggles down the stretch once again, Kevin Na moved to 21st with his second consecutive second-place finish.
And finally, in the weekly Tiger Woods watch, the former world No. 1 who is currently recovering from another back surgery is down to 351st, between South Africa's Richard Sterne and American Web.com graduate Bronson Burgoon.
Your Official World Golf Ranking top 10 for the week of Oct. 25, 2015: 1. Jason Day, 2. Jordan Spieth, 3. Rory McIlroy, 4. Bubba Watson, 5. Rickie Fowler, 6. Justin Rose, 7. Henrik Stenson, 8. Dustin Johnson, 9. Jim Furyk, 10. Zach Johnson