Johnson vaulted up 77 places to No. 49 this week.
Tiger Woods remained in first place this week as he prepares for a chance at a fourth green jacket at the Masters. Top contenders Vijay Singh, Ernie Els, Davis Love III and defending champion Mike Weir completed the top-five.
Jim Furyk, out of action after wrist surgery, held on to the sixth spot.
Padraig Harrington, who finished fourth at the BellSouth Classic, moved up one to seventh, while Phil Mickelson, who took 10th at Sugarloaf, jumped up two to eighth. Stuart Appleby stayed in ninth, but Retief Goosen, the 2001 U.S. Open champion, dipped three to No. 10.
Kenny Perry, Adam Scott, Chad Campbell all kept their places from last week. Darren Clarke and David Toms switched places from last week with Clarke taking 14th and Toms slipping to 15.
Scott Verplank and Jonathan Kaye stayed pat at 16 and 17, while Robert Allenby leapt up two to 18th. Fredrik Jacobson fell one to No. 19 and Shigeki Maruyama dropped to 20th after taking 19th last week.
Miguel Angel Jimenez won his second European Tour title of the year on Sunday at the Open de Portugal and moved up 16 to No. 37. That makes him the highest- rated Spanish player in the world and the sixth best European.