Michael Rubin, CEO of Fanatics, built a $1.5B business with the NFL this year—not as a player or team owner but by dominating the branded merchandise game for leagues like the NBA, WWE, and NASCAR. Starting as a teenage hustler flipping overstock, Rubin scaled from his ski shop days to launching GSI Commerce, selling it to eBay for $2.4B, and then buying back Fanatics, transforming it into a $27B powerhouse. His success comes from spotting overlooked value, going deep into niches, and leveraging