Michael Celli is an NFLPA-certified Contract Advisor and the President of Aggressive Sports Inc., a sports law and athlete representation firm. According to the NFLPA (National Football League Players Association), Celli has been certified as a Contract Advisor since 1994 and represents professional football players in contract negotiations and related services. He is also an attorney with a long-standing legal practice, licensed across multiple jurisdictions including New York, New Jersey, Florida, Pennsylvania, and federal courts. His work combines sports representation and legal services, focusing on contract negotiation, endorsements, and athlete business matters. At Aggressive Sports Inc., Celli provides full-service athlete representation, including NFL contract negotiation, marketing, branding, and endorsement deal management. The agency also works with clients in entertainment and media industries, expanding beyond football into broader sports and commercial representation. Celli is known as a long-tenured NFL agent with decades of experience in player representation and has handled contracts for professional athletes across multiple levels of football.