A.J. Foyt Enterprises
Matheus Leist
Tony Kanaan
Andretti Autosport Conor Daly (GP 6, 17) Zach Veach
Alexander Rossi
Ryan Hunter-Reay
Andretti Herta Marco Andretti
Arrow Schmidt Peterson
James Hinchcliffe
Marcus Ericsson (GPs 1-15, 17) Conor Daly (GP 16) Meyer Shank Racing
Jack Harvey (GPs 1-6, 10, 13, 16-17) MotoGator Team Stange Racing
Oriol Servia
(GP 6)
Carlin Charlie Kimball (GP 1, 6, 9, 14-17)
Patricio O'Ward (GPs 2-8, 10) Sage Karam (GPs 11-12) RC Enerson (GP 13) Max Chilton (GPs 1-8, 10-11, 13, 16-17) Conor Daly (GP 9, 12, 14-15) Chip Ganassi Racing
Scott Dixon
Felix Rosenqvist
Clauson-Marshall Racing Pippa Mann
Dale Coyne Racing Santino Ferrucci
James Davison
(GP 6)
Sébastien Bourdais
DragonSpeed Ben Hanley (GP 1, 3, 6) Dreyer & Reinbold Racing Sage Karam
(GP 6)
JR Hildebrand
(GP 6)
Ed Carpenter Racing Spencer Pigot
Ed Jones (GPs 1-5, 7-8, 10-11, 13, 16-17) Ed Carpenter (GP 6, 9, 12, 14-15) Ed Jones
(GP 6)
Harding Steinbrenner Racing Colton Herta
Juncos Racing Kyle Kaiser (GP 2, 6) McLaren Racing Fernando Alonso
(GP 6)
Rahal Letterman Lanigan Racing Graham Rahal
Takuma Sato
Jordan King
(GP 6)
Team Penske Josef Newgarden
Helio Castroneves
(GPs 5-6)
Will Power
Simon Pagenaud