Six remain eligible for IndyCar Series title
Dixon, who leads all drivers with 505 points, has a 65-point lead over Castroneves. Dixon has held the points lead after 10 of 13 races this season, and has held it consecutively since winning the 92nd Indianapolis 500 in May. The 2003 IndyCar Series champion has recorded five victories, and along with Castroneves, is the only driver with 11 top-five finishes.
Castroneves has stayed a close second behind Dixon since Indianapolis. Castroneves, who led the points for three races in April, has finished second six times this season but has yet to find victory lane.
Wheldon, the 2005 IndyCar Series champion, started the season with a third-place finish on the 1.5-mile oval at Homestead-Miami and followed with a victory on the 1.5-mile oval at Kansas. He also won at Iowa and has eight top-five finishes in 2008. He trails Dixon, his Target Chip Ganassi Racing teammate, by 115 points.
Kanaan, the 2004 IndyCar Series champion, is just three points behind Wheldon for third. Kanaan has two poles and a victory in 2008, and along with Dixon and Castroneves is the only driver with 11 top-10 finishes this season.
Briscoe, in his first season driving for Team Penske, has wasted no time throwing himself into championship contention. Following a slow start to the season that saw him finish 19th or worse in three of the first five races, Briscoe has recorded two victories. He is 181 points behind Dixon.
Patrick is 209 points behind Dixon. The Andretti Green Racing driver has not been lower than seventh in the point standings all season and was as high as third following her first career victory at Motegi in April.