| 摘要 |
Analysis of pitches to determine both their velocity and the location at which they arrive at the batter. The speed of the pitch is adjusted according to an adjustment value whose magnitude is a function of the location of the pitch relative to the batter. For example, high outside pitches would have a different adjustment value than low inside pitches. These adjustment values are calculated to take into account the fact that hitters must swing at different pitches at different times. That is, they must swing at some pitches earlier than others, depending on the location of the pitch. The adjusted speed, or "effective velocity," of the pitch is thus a function of both the pitch's velocity and its location relative to the batter, making it a more useful metric than velocity or location alone.
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