Introducing self-initiated expatriation in sports is the purpose of this chapter, as it has emerged as a growing phenomenon and subsequently as an important field for research, given its global reach and the amount of human, social and economic capital involved. We aim to demonstrate further evidence of the global presence of self-initiated expatriation in sports, will argue toward a definition of self-initiated expatriates in sports, and follow by introducing different streams of research by different academic disciplines addressing the phenomenon of athletes going global to advance in their careers. The chapter concludes by emphasizing three areas in which expatriation within sports differs significantly from other industries.