On January 30, 2015, Luca Filippi was hired by the team to contest the road and street circuits. On February 23, Newgarden acquired sponsorship from Century 21 Real Estate for the Indianapolis 500, and his number was changed from No. 67 to No. 21 for the race. On April 7, J. R. Hildebrand was hired to race in the two Indianapolis races with the No. 6 car.