保送率

保送率(BB/9,Walks per Nine Innings) 是一種棒球術語,指投手平均每9場球所投出來的保送。投手可能因為四壞球保送故意四壞球保送觸身球保送三種而使打者上壘。此數值關係到投手的控球精準度。

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