St. Pete: #30: Takuma Sato, Rahal Letterman Lanigan Racing Honda, #8: Marcus Ericsson, Chip Ganassi Racing Honda, #27: Alexander Rossi, Andretti Autosport Honda, #14: Sebastien Bourdais, A.J. Foyt Enterprises Chevrolet
#30: Takuma Sato, Rahal Letterman Lanigan Racing Honda, #8: Marcus Ericsson, Chip Ganassi Racing Honda, #27: Alexander Rossi, Andretti Autosport Honda, #14: Sebastien Bourdais, A.J. Foyt Enterprises Chevrolet