Road America: #20: Conor Daly, Ed Carpenter Racing Chevrolet, #30: Takuma Sato, Rahal Letterman Lanigan Racing Honda, #5: Pato O’Ward, Arrow McLaren SP Chevrolet
#20: Conor Daly, Ed Carpenter Racing Chevrolet, #30: Takuma Sato, Rahal Letterman Lanigan Racing Honda, #5: Pato O’Ward, Arrow McLaren SP Chevrolet