Who wins?
Yankees-Red Sox vs Lakers-Celtics
Lakers-Celtics wins 93% to 7%. 28 more put them in the same row. From Famous Sports Rivalries Tier List. Pick a side.
chunky_wizard on Yankees-Red Sox: the 2004 ALCS and A Rod vs Varitek, peak hatred
random_penguin_69 on Lakers-Celtics: the most championships between two franchises in any sport
Famous Sports Rivalries Tier List: the full ranking