Tiger Woods remained well ahead of the world, followed by Ernie Els and Davis Love III, who took third place at Firestone.
Vijay Singh moved up to fourth this week, followed by U.S. Open champion Jim Furyk, who dropped a notch to fifth. Masters winner Mike Weir stayed in sixth place while David Toms moved up to No. 7. Kenny Perry dipped one rung to eighth.
Padraig Harrington, who missed the birth of his first child while at the NEC Invitational, held on to ninth while Phil Mickelson rounded out the top-10.
Nick Price and Retief Goosen remained in 11th and 12th from last week, followed by Clarke. Justin Leonard and Chris DiMarco each slipped one spot to 14th and 15th, respectively.
Robert Allenby came in 16th, Sergio Garcia fell two spots to 17th and Jay Haas climbed one spot to No. 18. Thomas Bjorn entered the top-20 at No. 19 while Charles Howell III completed the top-20.
Kirk Triplett jumped 19 spots to 43rd after his victory this weekend at the Reno-Tahoe Open.