NFL contracts were Gronk's primary source of income. He earned a massive sum throughout his career, particularly with the New England Patriots and Tampa Bay Buccaneers.
Gronkowski's charisma and larger-than-life personality make him a favorite for brands. Endorsement deals with companies like Nike, Dunkin' Donuts, and Lyft likely added significantly to his wealth.
His signature touchdown celebration, the "Gronk Spike," became iconic, potentially influencing his marketability and endorsement deals.