Hector Rivas is an entrepreneur, NFLPA-certified contract advisor, and co-founder of Nukleus, a sports representation and athlete development company focused on professional football talent. He is best known in the business world as the founder and former CEO of ThriftBooks, one of the largest online sellers of used books in the United States. Rivas later expanded his interests into sports management, leveraging his entrepreneurial experience to help build organizations dedicated to athlete representation, business development, and long-term career growth. In addition to his business accomplishments, Rivas co-founded Disruptive Sports Agency alongside veteran sports marketer and NFLPA-certified agent Henry Organ. Within the agency, Rivas focused on organizational leadership, growth strategy, and cultivating a culture centered on athlete empowerment and long-term success. The agency gained recognition for representing NFL players and securing significant professional contracts, while emphasizing opportunities for athletes beyond the playing field. His combination of entrepreneurial expertise and sports industry involvement has helped position him as a unique figure in athlete representation. Through his work with Nukleus and prior ventures in sports representation, Rivas has emphasized a holistic approach to athlete management that extends beyond contract negotiations to include business education, branding, and post-career planning. His background in building and scaling successful companies provides athletes with access to business insights and strategic guidance designed to help them maximize opportunities during and after their professional playing careers. As an NFLPA-certified advisor and accomplished entrepreneur, Rivas continues to bridge the worlds of sports, business, and athlete development.