The Twins' 0.525 winning percentage fell within that standard range, translating to a score of less than one standard deviation above the 0.500 mean.

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Counting up wins in a season relative to the competition (how balanced was the league in each season?) yielded us a G-Score, as in "greatness, " a standard deviation measurement that shows the degree to which a team stood out among the field in a given year.

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The Calculation: To quantify the data, I measured each of those four statistics (YTD return, number of up days, standard deviation, and maximum drawdown) against all other stocks and gave them a score from zero to 100.

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To equalize the measurement of team performance across eras, we've created the G-score (as in "greatness"), basically a zippy name for what statistical connoisseurs call standard deviation.

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