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• PITCHf/x에서의 구종분류 (Fangraph 기준) Fastballs FA = fastball FF = four-seam fastball FT = two-seam fastball FC = fastball (cutter) FS / SI that pitchers throw a wide variety of pitches that are all 90-ish MPH and have similar movements. blog.naver.com · 2016.12.29