Formasi awal untuk Firestone Grand Prix St. Petersburg

1. Akan Memberdayakan AUS Team Penske Chevrolet

2. Tim Josef Newgarden USA Penske Chevrolet

3. Felix Rosenqvist SWE Chip Ganassi Racing Honda

4. Scott Dixon NZL Chip Ganassi Racing Honda

5. Ryan Hunter-Reay USA Andretti Autosport Honda

6. Alexander Rossi USA Andretti Autosport Honda

7. Jack Harvey GBR Meyer Shank Racing Honda

8. Charlie Kimball USA Carlin Racing Chevrolet

9. James Hinchcliffe BISA Panah Schmidt Peterson Motorsports Honda

10. Graham Rahal USA Rahal Letterman Lanigan Racing Honda

11. Colton Herta USA Harding Steinbrenner Racing Honda

12. Ben Hanley GBR Dragonspeed Racing Chevrolet

13. Simon Pagenaud FRA Team Penske Chevrolet

14. Zach Veach USA Andretti Autosport Honda

15. Ed Jones UAE Ed Carpenter Racing dengan Scuderia Corsa Chevrolet

16. Spencer Pigot USA Ed Carpenter Racing Chevrolet

17. Marco Andretti USA Andretti Herta Autosport dengan Marco Andretti & Curb-Agajanian

18. Marcus Ericsson, SWE Arrow Schmidt Peterson Motorsports Honda

19. Sebastien Bourdais FRA Dale Coyne dengan Vasser Sullivan Honda

20. Takuma Sato JPN Rahal Letterman Lanigan Racing Honda

21. Chevrolet Tony Kanaan BRA AJ Foyt Racing

22. Chevrolet Balapan Matheus Leist BRA AJ Foyt

23. Santino Ferrucci USA Dale Coyne Balap Honda

24. Max Chilton GBR Carling Racing Chevrolet

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