A.J. Foyt Enterprises
Dalton Kellett
Sébastien Bourdais
Charlie Kimball
(GPs 5-6)
Andretti Autosport Colton Herta
Alexander Rossi
Ryan Hunter-Reay
James Hinchcliffe
Andretti Herta Marco Andretti
(GP 6)
Arrow McLaren SP Patricio O'Ward
Felix Rosenqvist
Juan Pablo Montoya
(GPs 5-6)
Carlin Max Chilton (GPs 1-2, 5-13, 15-17) Conor Daly (GPs 3-4, 14) Chip Ganassi Racing Marcus Ericsson
Scott Dixon
Alex Palou
Jimmie Johnson (GPs 1-2, 5, 7-13, 15-17)
Tony Kanaan (GPs 3-4, 6, 14) Dale Coyne Racing
Ed Jones
Romain Grosjean (GPs 1-2, 5, 7-13, 15-17) Pietro Fittipaldi (GPs 3-4, 6, 14) Cody Ware
(GPs 5-6)
Ed Carpenter Racing Conor Daly (GPs 1-2, 5, 7-13, 15-17) Ed Carpenter (GPs 3-4, 6, 14)
Rinus VeeKay
Meyer Shank Racing Helio Castroneves (GP 6, 12-13, 15-17) Jack Harvey
Paretta Autosport
Simona De Silvestro
(GP 6)
Rahal Letterman Lanigan Racing Graham Rahal
Takuma Sato
Santino Ferrucci
(GP 6)
Team Penske Josef Newgarden
Will Power
Simon Pagenaud
Scott McLaughlin