During the 2015 season Rahal broke a 6+ year winless streak by winning the 2015 MAVTV 500 at Auto Club Speedway in Fontana, CA. Rahal again won later in the season at the 2015 Honda Indy 200 at Mid-Ohio. The win was especially poignant for Rahal, since he grew up in Ohio and also put Rahal in the championship hunt for the first time in his career. Rahal ended finishing 4th in the standings after a disappointing performance in the last two races.