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It`s hard to judge across the board what single rivalry holds the most intrigue. It also depends on where in the world we talk about. So I thought of some of the big ones that come to mind. The first is in the MLB with the Red Soxs/Yanks. One of the oldest ones, that have had alot of players bouncing from each team. It has alot of playoff implications usually and every series is important. The Yanks history is stronger, since the Babe Ruth trade that doomed the Red Soxs.