Endorsement of sport and non-sport products by athletes is an extremely popular method that corporations use to drive sales and advertising. Traditionally, celebrity endorsement research has focused on the physical attractiveness of the endorser; while this makes sense, it provides only a partial explanation why consumers purchase athlete-endorsed products. Several other components of source credibility, as well as previously unexplored elements such as "heroic" traits, prove to be stronger predictors of intent-to-purchase. A 3-phase research study of Americans aged 18-35 was conducted, with a Celebrity-Hero Matrix© (CHM) developed and several marketing recommendations made based on the findings.