Matthew Mainiero is an NFLPA-certified sports agent and executive football operations professional with Team Sports Agency, a Dallas-based sports representation firm specializing in NFL contract negotiation and athlete development. He works within the agency’s football division, where he contributes to contract advisory services, player representation, and organizational support for professional football clients across the NFL. Mainiero became NFLPA-certified as a contract advisor in 2017 and has since been actively involved in representing NFL players through Team Sports Agency. His work includes participation in contract negotiations, endorsement opportunities, and roster-related advisory services for athletes entering the league as well as those managing active professional careers. He operates within a team-based agency structure that emphasizes collaboration in player evaluation, contract strategy, and long-term career planning. At Team Sports Agency, Mainiero holds a leadership role in football operations, supporting the agency’s broader mission of providing full-service athlete representation. The agency is known for its integrated approach to player management, combining contract negotiation, training support, and marketing strategy to maximize both on-field and off-field opportunities for clients.