NFL 2021: All the teams, sponsors and broadcasters - SportsPro
Up Close on Baseball's Borders - The New York Times
America's Favorite Out of State Football Teams, Mapped - Custom Ink
NFL teams' most rabid fans, in one county-by-county map - Vox
Buffalo Bills? New York Giants? Jets? Which NFL team is most popular?
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The most popular NFL team in each county - Hella Entertainment
NFL Team owners: Who are the richest owners in 2022
Where Do NFL Fans Live? Mapping Football Fandom Across the U.S.
The Most Popular NFL Teams by County, State