[問題] 球種使用分析
在球賽更換投手的時候，
現場轉播單位都會秀出一個有關投手球種使用分析的資訊，
小弟想請教，
分析的資訊為什麼只有分FASTBALL(速球),BREAKING BALL(變化球),CHANGEUP(變速球)這
三種的比例。
是因為變化球只泛指曲球,滑球,指叉球?
變速球不含在其中。
還是有其他的分類用意?
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