Tiger Woods, who took ninth place at Mount Juliet Conrad despite battling back pain all week, fell to third for the first time since 1999. Vijay Singh, who did not play in the American Express Championship, remained in first.
Phil Mickelson, who also withdrew from the third World Golf Championships event this year, stayed in fourth, while U.S. Open champion Retief Goosen kept his fifth place.
Davis Love III, Mike Weir, Padraig Harrington and Stewart Cink held their rankings from the previous week. Sergio Garcia, who tied for fourth place in Ireland, jumped up two places to No. 10.
Adam Scott and Jim Furyk each dropped one to 11th and 12th, respectively. Darren Clarke, who shared fourth with Garcia, climbed three places to 13th. Chris DiMarco kept his 14th ranking, while Stuart Appleby fell two to round out the top-15.
Chad Campbell dipped one spot to 16th, but Kenny Perry and 2004 British Open winner Todd Hamilton remained 17th and 18th, respectively. Miguel Angel Jimenez and Stephen Ames switched places from last week with the Spaniard taking 19th and Ames falling to 20th.