Phil Mickelson rose two places to second in the world rankings issued on Monday after his victory in the U.S. Masters at Augusta.
The American left-hander's two-stroke win over South African Tim Clark in the first major of the year on Sunday pushed him up to second in the rankings for the first time since 2003.
Fijian Vijay Singh dropped to third while South African Retief Goosen went down to fourth.
Clark's runner-up finish elevated him to 15th while Spain's Jose Maria Olazabal and Chad Campbell of the U.S., joint third alongside Goosen, world number one Tiger Woods and American Fred Couples, moved up to 12th and 14th respectively.