There is a tension between encouraging diversity and the pursuit of excellence in sport. Using a mixed methods approach, this project investigates how junior sports clubs and their participants manage this tension and its impact on diversity in terms of culture, gender and, inparticular, (dis)ability. Sport participation socialises young people to understand social norms around race/ethinicity, gender, ability and other axes of diversity. Diversity management in junior sport affects young people understand and react to diversity throughought their lives. The research will increase policy markers' and practitioners' knowledge and capacity to develop inclusive environments that welcome people of all backgrounds and abilities.