Claim: George Follmer, an American former auto racing driver, and one of the most successful road racers of the 1970s, was the only SCCA champion that participated in the IROC II.
Evidence: George Follmer (born January 27, 1934) is an American former auto racing driver, and one of the most successful road racers of the 1970s. United_States Bobby Unser USAC Champ Car United_States A. J. Foyt USAC Champ Car United_States Cale Yarborough NASCAR Winston Cup United_States Bobby Allison NASCAR Winston Cup Brazil Emerson Fittipaldi Formula One United_States David Pearson NASCAR Winston Cup United_States George Follmer SCCA Sweden Ronnie Peterson Formula One United_States Johnny Rutherford USAC Champ Car United_States Richard Petty NASCAR Winston Cup United_Kingdom Graham Hill Formula One South_Africa Jody Scheckter Formula One