Measuring a Pitcher's Ace Factor

Below is a statistical collection of the seasonal performances of every starting pitcher between 1950 and 2010.

Each pitcher’s season, represented by a blue diamond, was measured by a calculation that didn’t consider any of the usual suspects typically used in measuring a pitcher’s effectiveness, such as ERA, strikeouts, WHIP, shutouts, or even ground ball percentages, contact [...]

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Meet the new Park Factors - Part I

“It’s a park that could make you a hero or a bum.”

– Stan Musial on the Polo Grounds, 1957

Stan Musial was truly one of the most consistently great hitters baseball has ever seen. With a lifetime average of .331, his slumps were like comets—showing up every few years, then disappearing in a flash.

Yet, the [...]

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