This study comprehensively examines the effects of digital transformation on the sports industry, revealing how digital marketing strategies are structured within sports clubs, how they transform fan engagement, and how they diversify revenue models. Digital marketing is no longer merely a communication tool; it has become a strategic component at the core of clubs’ sustainable competitive advantage, financial growth, and global branding processes. The research findings indicate that the success of digital marketing strategies depends on clubs’ rapid adaptation to technological innovations, the strengthening of data-driven decision-making mechanisms, prioritizing user experience, and the sustainable management of brand trust. Practices in areas such as social media, e-sports, digital media, and data analytics offer sports clubs new opportunities on both economic and cultural levels. Through digital marketing, clubs engage with fans not merely as customers but as active members of a community—an approach that enhances brand loyalty and emotional attachment.