The four remaining IndyCar Series championship contenders claimed the top four spots during today’s Marlboro Pole Qualifying for the PEAK Antifreeze Indy 300 presented by Mr. Clean.

Marlboro Team Penske’s Sam Hornish Jr. secured his fourth pole award of the season with a time of 25.4134 seconds, 215.319 mph in his Honda-powered Dallara. Hornish currently sits second in the championship point standings, one point behind teammate Helio Castroneves.

Joining Hornish on the front row is Target Chip Ganassi Racing’s Scott Dixon, who secured the second starting spot with a lap of 25.4996 seconds, 214.592 mph. Dixon is 21 points shy of the top spot in the championship.

Third place points sitter Dan Wheldon secured the third starting position (25.5239 seconds, 214.387 mph) and will start alongside points leader Castroneves (25.5794 seconds, 213.922 mph). Rounding out the top five was Delphi Fernandez Racing’s Scott Sharp with a time of 25.6212 seconds, 213.573 mph.

Also on Saturday, rookie Jay Howard secured his first Indy Pro Series Championship with his third place in the Chicagoland 100. The 2005 series champion, Wade Cunningham, won the race, securing the entrant championship for Brian Stewart Racing, its second consecutive entrant championship in the Indy Pro Series.

Qualifying Saturday for the Peak Antifreeze Indy 300 IRL IndyCar Series event on the 1.5-mile Chicagoland Speedway, with starting position, car number in parentheses, driver, chassis-engine and speed:

1. (6) Sam Hornish Jr., Dallara-Honda, 215.319
2. (9) Scott Dixon, Dallara-Honda, 214.592
3. (10) Dan Wheldon, Dallara-Honda, 214.387
4. (3) Helio Castroneves, Dallara-Honda, 213.922
5. (8) Scott Sharp, Dallara-Honda, 213.573
6. (4) Vitor Meira, Dallara-Honda, 213.474
7. (2) Tomas Scheckter, Dallara-Honda, 213.024
8. (55) Kosuke Matsuura, Dallara-Honda, 212.715
9. (15) Buddy Rice, Dallara-Honda, 212.644
10. (17) Jeff Simmons, Dallara-Honda, 212.182
11. (27) A.J. Foyt IV, Dallara-Honda, 212.160
12. (20) Ed Carpenter, Dallara-Honda, 212.093
13. (11) Tony Kanaan, Dallara-Honda, 211.740
14. (26) Marco Andretti, Dallara-Honda, 211.349
15. (16) Danica Patrick, Dallara-Honda, 211.153
16. (5) Sarah Fisher, Dallara-Honda, 210.940
17. (14) Jeff Bucknum, Dallara-Honda, 210.700
18. (7) Bryan Herta, Dallara-Honda, 210.679
19. (25) Marty Roth, Dallara-Honda, 209.713