“打击者”的英语？

投手不只仰赖速度让打击者打不到球.Pitchers don't just rely on speed to get a pitcha batter.现在打击者是谁?Who is at bat now?尚未被歼和尚未受歼灭性打击者只有五十四个旅.There are only 54 brigades which have neither been wiped out nor received crushing blows....