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侧肩投法

德州游骑兵侧投手Scott Feldman英语Scott Feldman (baseball)投球英姿。

侧肩投法(英语:Sidearm),又称侧投,为棒球投手的出手点之一,指投手投球时,以手臂横摆的方式出手的投球方式。一般所提之侧投多半指典型侧投手,也就是左投手以九点钟方向附近,而右投手以三点钟方向附近为出手点的投手,出手点稍高者可视为四分之三侧投(low three-quarters)或称斜肩侧投,而稍低者可视为低肩侧投,但低肩侧投的动作机制与侧投有一定程度的歧异。

投球方式

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侧肩投法的投球方式与斜肩投法类似。在投球跨步的过程中,部分投手会将上半身明显向胸前倾斜下探,类似下勾投手的投球机制,但出手时仍会将挥臂的角度转为水平。若能在挥臂时转为约莫水平的位置及减少上半身下探的幅度,无论采何种前置准备方式投球,基本上就能算是侧肩投球。由于标准侧肩投法的投球方式在执行过程的前半部分类似于四分之三投球,因而少部分采斜肩投法的投手偶尔会用突袭式侧肩投法,以求扰乱打者节奏之效。

球路特性

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侧投手的球路水平横移的幅度较斜肩投法来的大,因此对于同侧打者有相当程度的威胁性,尤其是滑球切球,而对于横向及纵向变化兼具的伸卡球 (沉球)在下坠方面的威力会更大,会带会同侧打者内角的威胁,但对于反侧打击的打者来说,这些威胁却成为有利之处,但侧投投出的变速球对于所有打者都具有压制性,而且球威不受出手角度的影响,因此现在的侧投手对于变速球的训练相当有意愿,以增加对于相反侧打者周旋的本钱。部分侧投手亦能因投球技巧的掌握而能投出指叉球曲球(如高津臣吾)等具有下坠效果的球路。

场上角色

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以担任中继为主(如斯科特·费尔曼(Scott Feldsman)、冈本晃日语岡本晃三瀬幸司),但亦有身手不凡的侧投手能胜任终结者(如艾克斯利高津臣吾),甚至有部分的投手能胜任先发投手(如斋藤雅树)。

知名投手

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参考资料

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侧肩投法
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