The rapid advancement of blockchain technology presents unprecedented opportunities for reimagining circular supply chains in the sports industry, contributing to sustainability and enhancing transparency in manufacturing and distribution processes. This chapter delves into the confluence of blockchain and circular economy (CE) principles within the context of sports, analyzing how blockchain's immutable ledger, smart contracts, and decentralized structures can foster more accountable, transparent, and resource-efficient supply chains. By tracking materials, certifying authenticity, and facilitating responsible recycling, blockchain enables a paradigm shift toward more sustainable practices in sports manufacturing, reducing waste, and promoting ethical sourcing. Through case studies and theoretical frameworks, this chapter explores blockchain's transformative role in ensuring the sustainability of both production and consumption in the sports sector.