Nice. I would guess that the odds of one team in an extra inning scoring the exact same number of runs as the other team in that extra inning (including zero) is 71.8%. Squaring 0.718 yields 0.516, which are the odds that I calculated that any given extra inning would end still tied.
I love stuff like this--totally independent analysis yielding the same results. You might just be the man (or woman), birtelcom.

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