i'd be up for each team picking a rival team to play each season except that there are more nl teams than al teams, meaning some teams will have 2 rivals (or none)
NYY GM (2010-2017):
791-507 (.610)
4-time ALCS Champs
2014 World Series Champs
791-507 (.610)
4-time ALCS Champs
2014 World Series Champs