Woods posted a final round of 67 in the Monday finish of the unofficial fifth major at PGA Tour headquarters in Ponte Vedra Beach, Florida. Woods, who won for the second straight week, now leads 'Lefty' by 16.40 points. Mickelson finished in a tie for 33rd with a final round of 77.
Singh, a runner-up for the second time this season, moved up three spots to fifth in the rankings, trailing Woods, Mickelson, Ernie Els and Lee Westwood.
Colin Montgomerie stayed sixth this week while Davis Love III, who missed his first cut of the season at Sawgrass, dropped two spots to seventh.
David Duval, who has withdrawn from the last two events due to a wrist injury, came in eighth followed by Hal Sutton and Darren Clarke.
Jesper Parnevik heads the list of the next five, trailed by Tom Lehman, Nick Price, Jim Furyk and Thomas Bjorn. Lehman fell two spots to 12th despite a 12th-place finish at The Players Championship.
Sergio Garcia, Mike Weir, Michael Campbell, Padraig Harrington and Stewart Cink complete the top-20.
Bernhard Langer used a final round of 67 and a third-place finish on Monday to move up 13 spots to 54th, while third-round leader Jerry Kelly, who finished fourth, jumped into the top-100 at 97th.
Three-time PGA Tour winner Tim Herron fell 17 spots to 82nd despite a tie for 21st in Ponte Vedra Beach.
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