Largada (roubo de base)
Also known as: jump, primeiro passo no roubo, arrancada
A largada em uma tentativa de roubo de base é a rapidez e a decisão com que um corredor sai em direção à próxima base no primeiro movimento do arremessador — o maior indicador isolado de sucesso no roubo de base.
Uma boa largada significa que o corredor lê o "sinal" do arremessador (o primeiro movimento que o compromete com um arremesso, em vez de um pickoff) e sai de forma explosiva antes de a bola chegar à luva do capturador. Ler o levantamento de perna, a elevação do calcanhar ou a rotação do ombro do arremessador identifica o momento do compromisso. Corredores com boa largada conseguem roubar bases mesmo contra capturadores de braço forte; corredores com largada ruim podem ser eliminados até contra capturadores de braço fraco. O pop time (tempo da luva do capturador até a luva do defensor na segunda base) menos o tempo de entrega do arremessador é igual à janela que o corredor precisa vencer.
Focus on identifying one specific movement the pitcher makes before every pitch. This means the heel lift, the knee drive, the shoulder turn. This means and practice breaking the instant you see it in a controlled drill environment before attempting to use the read in a live steal attempt.
Chart each pitcher's delivery time and compare it to your personal time to second base at various jump delays. This means this calculation tells you exactly how many milliseconds of jump advantage you need against a specific pitcher-catcher combination before a steal attempt has a positive expected outcome.
Example
Ele leu a elevação do calcanhar do arremessador e saiu imediatamente — quando o capturador se levantou para arremessar, o corredor já tinha percorrido 3/4 do caminho até a segunda base.
How it shows up on video
On video, jump quality is evaluated by measuring the elapsed time between the pitcher's first movement and the runner's first explosive step, along with whether the initial direction of the step is directly toward second base rather than laterally into a crossover setup. Common errors include the runner waiting for the pitch to be released before breaking (losing 0.3–0.5 seconds of jump window), an initial step that is lateral rather than directly toward second (adding distance). A break that begins with a pickup step rather than a direct crossover (wasting the first body movement on a directional setup rather than forward progress).
Common mistakes
- Waiting for the ball to cross home plate before breaking. This means the correct trigger is the pitcher's commitment movement, not the pitch location, and waiting for the pitch loses 0.3–0.5 seconds of window that no base runner can recover through pure speed
- Breaking with a lateral crossover setup step as the first movement rather than directly toward second. This adds a full stride of wasted motion before any forward progress toward the base is made
- Using the same trigger read against all pitchers rather than scouting the specific tell of each pitcher you face. This means a generic timing approach is always later than a pitcher-specific one
- Breaking on a pitch-in-the-dirt read before confirming the ball is actually in the dirt. This means a pitch that bounces right in front of the plate and stops near home is not the same as a wild pitch that gets past the catcher, and breaking early on an in-front bounce risks being doubled off on a passed-ball that the catcher recovers
In SwingVantage Motion Lab
SwingVantage measures the elapsed time between the identified pitcher commitment movement and the runner's first explosive step, providing a jump score expressed in milliseconds. The system also evaluates the direction of the first step. This means directly toward second versus lateral or backward. This means and flags initial directions that add distance rather than reduce it.
Related terms
- Tomada de base primária (lead off base)A tomada de base (lead) é a distância que um corredor toma da base antes do arremesso — maximizar essa distância reduz o trajeto até a próxima base, mas precisa administrar o risco de ser eliminado (pickoff).
- Lead secundário (secondary lead)O lead secundário é o movimento que um corredor faz enquanto o arremesso cruza o home — um passo ou deslocamento que soma impulso em direção à próxima base no exato momento em que a bola é rebatida.
- Leitura de corrida de base (baserunning read)Uma leitura de corrida de base é a decisão tomada em uma fração de segundo pelo corredor, com base no que a bola faz depois do contato — avançar, esperar ou recuar.
- Reconhecimento de arremesso (pitch recognition)Reconhecimento de arremesso é identificar o tipo e a localização de um arremesso cedo — saindo da mão do arremessador e a partir do giro — para que o rebatedor consiga se comprometer com um swing ou deixar passar antes que seja tarde demais para agir.
Related guides & benchmarks
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