The NFL my take a page out of MLB's playbook:
Rozelle League--Baltimore Ravens, Buffalo Bills, New England Patriots, New York Giants, New York Jets, Philadelphia Eagles, Pittsburgh Steelers, Washington First Nations
Cosell League--Atlanta Falcons, Dallas Cowboys, Houston Texans, Jacksonville Jaguars, Miami Dolphins, New Orleans Saints, Tennessee Titans
Frozen Tundra League--Chicago Bears, Cincinnati Bengals, Cleveland Browns, Detroit Lions, GREEN BAY PACKERS, Indianapolis Colts, Kansas City Chiefs, Minnesota Vikings
Walsh League--Arizona Cardinals, Denver Broncos, Las Vegas Raiders, Los Angeles Chargers, Los Angeles Rams, San Francisco 49ers, Seattle Seahawks