アメリカの専門家「大谷の速球は空振り取れない。速球より変化球投手」

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The positive interpretation is that Ohtani didn’t need to rely too heavily on his fastball, because he likes his other stuff.
That’s very true.
He threw plenty of sliders, and plenty of splitters.
A more negative interpretation is that Ohtani’s fastball has big velocity, but it still might not be a swing-and-miss pitch.
It comes with a roughly average spin rate, and it doesn’t profile as one of the classic rising four-seamers.

大谷は他の武器があるので速球に頼る必要がない
強力なスライダーやスプリットがあるからだ
しかし、大谷の速球はとてつもなく速いが空振りは取れないだろう
回転が少なく、ノビのあるフォーシームにはならないからだ
ttps://www.fangraphs.com/blogs/the-good-and-bad-of-shohei-ohtanis-pitching-debut/