Salida en robo (jump)
Also known as: jump, primer paso en el robo, arranque
El jump (salida) en un intento de robo es lo rápido y decidido que un corredor arranca hacia la siguiente base al primer movimiento del lanzador: el mayor predictor individual del éxito en el robo de bases.
Un gran jump significa que el corredor lee la "señal" del lanzador (el primer movimiento que lo compromete a un lanzamiento frente a un pickoff) y arranca de forma explosiva antes de que la bola llegue al guante del receptor. Leer el levantamiento de pierna, la elevación del talón o la rotación del hombro del lanzador identifica el momento del compromiso. Los corredores con un buen jump pueden robar bases a receptores con brazos fuertes; los corredores con jumps malos pueden ser puestos out incluso ante receptores de brazo débil. El pop time (tiempo desde el guante del receptor hasta el guante del fildeador en la segunda) menos el tiempo de entrega del lanzador es igual a la ventana que el corredor debe superar.
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
Leyó la elevación del talón del lanzador y arrancó de inmediato: para cuando el receptor se incorporó para tirar, el corredor ya había recorrido 3/4 del camino hacia la segunda.
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
- Lead (abrirse de la base)El lead (abrirse de la base) es la distancia que un corredor toma desde la base antes del lanzamiento: maximizar la distancia del lead reduce la distancia hasta la siguiente base a la vez que se gestiona el riesgo de que lo sorprendan (pickoff).
- Lead secundarioEl lead secundario es el movimiento que hace un corredor mientras el lanzamiento cruza el plato: un paso caminando o lateral que añade impulso hacia la siguiente base en el instante en que se produce el contacto.
- Lectura al correr las basesUna lectura al correr las bases es la decisión en una fracción de segundo que toma un corredor según lo que hace la bola tras el contacto: si avanzar, quedarse o retroceder.
- Reconocimiento del lanzamiento (pitch recognition)El reconocimiento del lanzamiento es identificar el tipo y la localización de un lanzamiento de forma temprana —al salir de la mano del lanzador y por el efecto— para que el bateador pueda comprometerse a hacer swing o a dejarla pasar antes de que sea demasiado tarde para actuar.
Related guides & benchmarks
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