 After Roger Penske sold his racetracks (Fontana, Michigan, and Nazareth) to the International Speedway Corporation, the IRL began racing at these tracks in the 2002 season.Nazareth Speedway only held three races before ISC closed the track in 2004.Michigan Speedway was raced until the 2007 season and the Auto Club Speedway, formerly California Speedway, until the 2015 season.