Starting Lineup: Oliver Askew (No. 7 Arrow McLaren SP Chevrolet), Pato O’Ward (No. 5 Arrow McLaren SP Chevrolet), Fernando Alonso (No. 66 Ruoff Mortgage Chevrolet for the Indianapolis 500).
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Starting Lineup: Ben Hanley (No. 81 Chevrolet).
Starting Lineup: Sage Karam (No. 24 WIX Filters Chevrolet).
Starting Lineup: Ed Carpenter (No. 20 Ed Carpenter Racing Chevrolet, oval tracks only); Rinus VeeKay (No. 21 SONAX Chevrolet); Conor Daly (No. 20 U.S. Air Force Chevrolet, road/street circuits, will switch car numbers for Indianapolis 500).
Starting Lineup: Santino Ferrucci (No. 18 Team SealMaster Dale Coyne Racing with Vasser-Sullivan Honda), Alex Palou (No. 55 Dale Coyne Racing with Team Goh Honda).
Starting Lineup: Scott Dixon (No. 9 PNC Bank Honda); Marcus Ericsson (No. 8 Huski Chocolate Honda); Felix Rosenqvist (No. 10 NTT DATA Honda).
Starting Lineup: Charlie Kimball (No. 4 Tresiba Chevrolet), Tony Kanaan (No. 14 Chevrolet on the oval tracks), Sebastien Bourdais (No. 14 Chevrolet on selected road courses), Dalton Kellett (No. 14 Chevrolet on selected road courses).
Starting Lineup: Graham Rahal (No. 15 United Rentals Honda), Takuma Sato (No. 30 Mi-Jack/Panasonic Honda), Spencer Pigot (No. 45 Rahal Letterman Lanigan Racing with Citrone/Buhl Autosport Honda for the Indianapolis Motor Speedway races).