Philadelphia, PA (SportsNetwork.com) - Jason Day defeated J.B. Holmes, Harris English and 2014 champion Scott Stallings in a playoff to win the Farmers Insurance Open Sunday, and that victory helped vault Day into the No. 4 spot in the world rankings.

Day was previously No. 8 in the world, but the win saw him improve four spots up to No. 4.

Rory McIlroy remained in firm control of the world's No. 1 ranking despite not playing last week. Also staying put was Henrik Stenson and Bubba Watson at Nos. 2 and 3, respectively.

As he jumped up to No. 4, Day bumped fellow Australian Adam Scott down one to No. 5. Jim Furyk and Sergio Garcia swapped spots, with Furyk up one to No. 6 and Garcia down one to No. 7.

After missing the cut at the Farmers Insurance Open last week, Justin Rose fell three spots from five to eight. Jordan Spieth also missed the cut, but he is still at nine, while Matt Kuchar held steady at 10.

Martin Kaymer, Rickie Fowler, Jimmy Walker and Hideki Matsuyama remained Nos. 11-14, while Patrick Reed and Victor Dubuisson traded places, with Reed jumping one to 15 and Dubuisson falling a spot to 16.

Billy Horschel, Phil Mickelson, Brooks Koepka and Graeme McDowell rounded out the top 20 again from No. 17.

After withdrawing in the first round of last week's event, Tiger Woods continued to fall further in the world rankings. Woods dropped six spots to No. 62, which is the worst he has been since October of 1996.

Looking to punch his Masters ticket this year, Anirban Lahiri jumped 36 spots into the top 50 and up to No. 37 following his 1-shot victory at the Maybank Malaysian Open last week.