決め球
Also known as: 勝負球, アウトピッチ
決め球とは、投手がツーストライクのカウントで打者を打ち取るために使う特定の球種で、打者の傾向を踏まえた最も信頼できる空振り奪取の武器である。
トップレベルのファストピッチ投手は、打者を仕留めるために頼る球種を正確に把握している。多くの場合、高め内角のライズボールや外角低めのドロップボールである。決め球はスカウティング(打者は高めを追いかけるか)や試合状況に基づいて選ばれ、通常は打席を通して他のコースや変化球で布石を打った末に投げ込まれる球種である。支配的な決め球を持つことは、相手が打席全体にどう向き合うかを変えてしまう。
Pick your single best swing-and-miss pitch and commit to developing it to elite command. This means having one dominant strikeout pitch is more effective than having three average ones.
Develop a secondary strikeout pitch for a different hitter profile. This means for example, a rise ball for hitters who swing up and a drop ball for hitters who level out. This means. As a result, you have an answer for every batter type.
Example
打者のタイミングを崩すために2球のファストボールを投げ込んだ後、投手は高め内角のライズボール、彼女の決め球で空振りを奪う。
How it shows up on video
On video you can confirm a pitcher's strikeout pitch by tracking which pitch type appears most frequently in two-strike counts and comparing it to swing-and-miss rate by pitch. The hitter will show the most exaggerated swing path deviation on the strikeout pitch. This means an uppercut on a high rise ball or a roll-over on a low drop ball confirms the pitch is working. Look for the catcher setting a more decisive, confident target on the two-strike pitch compared to earlier counts.
Common mistakes
- Using the strikeout pitch too early in the count before establishing it with location work, making it hittable because the hitter isn't yet guessing wrong
- Defaulting to the same strikeout pitch regardless of the hitter's tendencies rather than selecting based on scouting data
- Throwing the strikeout pitch in a location that leaks over the heart of the zone in two-strike counts when stress is highest
- Hitters over-protecting the zone in two-strike counts without identifying which specific pitch the pitcher uses to finish at-bats
In SwingVantage Motion Lab
Motion Lab identifies your two-strike pitch selection patterns and compares swing-and-miss rate by pitch type and location to surface which combination is your true strikeout weapon.
Frequently asked questions
チェンジアップも決め球になり得るか。
なり得る。投手のチェンジアップがファストボールと同じアームスピードで投げられる場合、ファストピッチにおいて最も信頼できるツーストライクの球種の一つになる。
自分の最良の決め球が何かはどう判断すればよいか。
複数試合にわたり、球種ごとの空振り率と見逃しストライク率を記録する。ツーストライクのカウントで最も高い合計率を示す球種が、あなたの決め球である。
Related terms
Related guides & benchmarks
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