Perry, who won the Colonial by six shots in 2003, improved six positions to return to the top-10.
There was also a change at the top of the ranking, even though Tiger Woods and Vijay Singh weren't in action last week. Woods lost more points then Singh according to the World Ranking's system and dipped to No. 2, while Singh regained the top spot in the world.
Ernie Els stayed put at No. 3. Phil Mickelson and Retief Goosen also held their rankings from last week, while Adam Scott improved one spot to No. 6. Chris DiMarco was down one to No. 7 and Sergio Garcia remained at No. 8. Perry was next followed by Padraig Harrington, who dropped one position to No. 10.
David Toms, who will try to win the FedEx St. Jude Classic for the third straight season this week, also fell one position to No. 11. Luke Donald came in at No. 12 this week, while Stewart Cink, Darren Clarke and Mike Weir each fell one spot.
Stuart Appleby climbed one space to No. 16, switching place with Davis Love III, who fell to No. 17. Jim Furyk, Miguel Angel Jimenez and Scott Verplank rounded out the top-20.
Stephen Dodd captured the Nissan Irish Open for his second European Tour victory of the season. Dodd vaulted from No. 103 to No. 56 this week.