The top-five ahead of Weir remained the same, but the gap is closing. Vijay Singh held on to the top spot, but is taking this week off. Tiger Woods is still second, but could jump Singh this week with a top-four finish at the Nissan Open.
Ernie Els, who is also taking this week off, kept his grasp on third place. Mickelson is still fourth after winning for the second straight week. With the win at Pebble Beach, Mickelson closed the gap even further on Els though. Reigning U.S. Open champion Retief Goosen came in fifth.
Weir, who will be seeking his third straight Nissan Open title this week, was up to sixth while Sergio Garcia, Padraig Harrington and Stewart Cink each fell one spot. Davis Love III shared ninth place behind Mickelson at Pebble Beach and held tight at No. 10 in the world.
Australians Stuart Appleby and Adam Scott remained 11th and 12th, respectively. Darren Clarke and Miguel Angel Jimenez exchanged spots from last week with Clarke moving up one space to 13th.
David Toms also jumped three positions to come in at No. 15. Kenny Perry slipped one to 16 and was followed by Chris DiMarco and Justin Leonard, who each fell one slot.
Luke Donald held on to the 19th spot while Stephen Ames climbed one to 20th. Meanwhile, Chad Campbell dropped one space to 21st.
Niclas Fasth, winner of the Holden New Zealand Open, jumped 49 spots to No. 106 in the world. Englishman Greg Owen took third place behind Mickelson and Weir at Pebble Beach. That result helped him jump from 185 to 108 in the world.