Portland: #12: Will Power, Team Penske Chevrolet #5: Pato O'Ward, Arrow McLaren Chevrolet #77: Callum Ilott, Juncos Hollinger Racing Chevrolet #7: Alexander Rossi, Arrow McLaren Chevrolet
#12: Will Power, Team Penske Chevrolet
#5: Pato O'Ward, Arrow McLaren Chevrolet
#77: Callum Ilott, Juncos Hollinger Racing Chevrolet
#7: Alexander Rossi, Arrow McLaren Chevrolet