Immelman had a one-shot lead at the Wachovia Championship before he bogeyed the 18th hole to force the playoff. He didn't get his first PGA victory, but Immelman did benefit from the second-place finish, jumping 28 places to 52nd in the world.
Furyk's jump in the rankings forced Ernie Els to No. 6, but the top four remained the same: Tiger Woods was first again, followed by Phil Mickelson, Retief Goosen and Vijay Singh.
Sergio Garcia was also bumped back one spot to seventh, where he was trailed by David Toms, Adam Scott and Luke Donald to round out the top 10.
Jose Maria Olazabal and Henrik Stenson both moved up one place to 11th and 12th, respectively, forcing Chris DiMarco to 13th. Geoff Ogilvy moved up two spots to 14th and was followed by Tim Clark at 15th.
David Howell also jumped up a place to 16th, Chad Campbell fell three spots to 17th, Stuart Appleby vaulted four places to 18th, Fred Couples remained in 19th and Davis Love III jumped three slots to 20th.
The movement of Appleby and Love into the top 20 meant the exit of Rory Sabbatini and Kenny Perry.
Elsewhere in golf: Francesco Molinari's first victory on the European Tour at the Italian Open moved him up 98 places to 103rd; and Andrew Buckle's win at the Nationwide Tour's Virginia Beach Open bumped him 26 spots to 80th.