The authors offer an understanding of sports and social entrepreneurship and discuss its relation to the concept of social innovation. In a Swedish sports policy context, the chapter explores the concepts in order to better understand their relations to each other. The chapter presents four political reforms that are understood as social innovations. The differences of the concepts are discussed in the form of two notions. The authors conclude that social innovation within sports can be understood as a political/organizational form that can be based on social entrepreneurship as content, and that theories of social innovation generally lack characterizing notions of the actors, whereas the theory of social entrepreneurship, as outlined in this chapter, heavily leans on the concept of the social entrepreneur.