The 1st four IROC drivers:

True Value Press Release – for Immediate Release: “NASCAR Winston Cup Champion Jeff Gordon, Indy Racing League Champion Kenny Brack, IROC Champion/Winston Cup driver Mark Martin, and CART’s Championship Series driver Greg Moore are the first four drivers to accept invitations to compete in the 1999 True Value International Race of Champions.” IROC President Jay Signore said more drivers will be announced within a week(Nancy-StockCarFans Correspondent)