Updating it, based on current rumors and what the NFL would do... MLB with 32 (*Montréal & Nashville expansion / Astros and Padres switch Leagues / **A's move) American: North - Chicago - Cleveland - Detroit - Minnesota East - Baltimore - Boston - New York - Toronto South - Kansas City - *Nashville - Tampa Bay - Texas West - L.A. - **Las Vegas - San Diego - Seattle ------------------------------------------ National: North - Chicago - Cincinnati - Milwaukee - Pittsburgh East - *Montréal - New York - Philadelphia - Washington South - Atlanta - Houston - Miami - St. Louis West - Arizona - Colorado - L.A. - San Francisco And since they all play each other, now, I'd think there'd be "Protected Rivals", so that you'd still see Cubs/Cardinals, Rangers/Astros, etc.