George Follmer was the only SCCA champion that participated in the IROC II.
In 1965, he won the SCCA United States Road Racing Championship. A. J. Foyt Cale Yarborough Bobby Allison Emerson Fittipaldi David Pearson George Follmer Ronnie Peterson Johnny Rutherford Graham Hill USAC Champ Car USAC Champ Car NASCAR Winston Cup NASCAR Winston Cup Formula One NASCAR Winston Cup SCCA Formula One USAC Champ Car NASCAR Winston Cup Formula One Formula One 
