Woods' lead was trimmed to single digits last week after Mickelson won at Riviera, but it was up to 11.12 average points this week following his 15th World Golf Championships title.
Putting that into perspective, Mickelson has only 10.12 average points total as the second-ranked player.
Steve Stricker, Ernie Els and Adam Scott rounded out the top five for the second week in a row. They were followed by K.J. Choi, who made the quarterfinals and moved up two places to No. 6.
That knocked Justin Rose and Jim Furyk down one spot apiece to seventh and eighth. Rory Sabbatini, Padraig Harrington, Vijay Singh, Henrik Stenson, Sergio Garcia and Angel Cabrera remained 9-14.
Stewart Cink made Sunday's final, where he lost 8 and 7 to Woods. Cink moved up seven places to No. 15 in the rankings.
Luke Donald remained 16th, Geoff Ogilvy dropped two spots to 17th, Aaron Baddeley was 18th again, Zach Johnson dipped two places to 19th and Lee Westwood was down one to 20th.
Trevor Immelman dropped out of the top 20 to No. 21.