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Balle rapide coupée (cutter)

Also known as: cutter, cut fastball

Definition

La balle rapide coupée (cutter) est une balle rapide avec un mouvement tardif côté gant — plus rapide qu’un slider, avec une cassure plus petite qu’un slider — qui coince les frappeurs ou s’éloigne d’eux en coupant.

Le cutter vit entre la quatre-coutures et le slider, tant en vitesse qu’en mouvement. Lancé avec une prise de quatre-coutures légèrement décentrée (pression sur le majeur), il coupe côté gant de 2-4 pouces (5-10 cm) tardivement avec une inclinaison minimale. Comme il ressemble à une balle rapide jusqu’aux 10-15 derniers pieds (3-5 m), il est extrêmement difficile à frapper avec le barrel. Les lanceurs gauchers l’utilisent pour attaquer les mains des frappeurs droitiers ; les droitiers l’utilisent pour s’éloigner des gauchers. Le cutter de Mariano Rivera — presque son unique lancer — est l’exemple le plus célèbre de l’histoire du baseball professionnel.

Beginner tip

Start by simply shifting your four-seam grip one half-inch toward the middle finger and throwing at full effort. This means the small grip change will produce natural cut without any wrist manipulation.

Advanced note

Fine-tune cutter shape for specific matchups by varying middle-finger pressure. This means more pressure produces a tighter, smaller-break cutter ideal for eating right-handed hands. Lighter pressure with a touch more tilt produces a larger-breaking version that works away to left-handers.

Example

Son cutter s’est déplacé de deux pouces (5 cm) côté gant à 91 mph (147 km/h), attrapant le bout du manche de la batte du frappeur gaucher et produisant un roulant sur batte cassée.

How it shows up on video

On camera, the cutter should be visually identical to the four-seamer until the final 15 feet of flight where the glove-side cut becomes visible. Common errors include a visible wrist turn before release that transforms the cutter into a slider, an uneven grip shift that produces varying amounts of cut between reps. A release point that drifts glove-side compared to the four-seamer. This means creating an early visual divergence that alert hitters can learn to read.

Common mistakes

  • Turning the wrist or forearm outward before release in an attempt to add cut, converting the pitch into a slower, loopier slider rather than a late-cutting fastball
  • Uneven middle-finger pressure between reps, producing some pitches that cut as intended and others that behave like flat four-seamers with no movement
  • Locating the cutter middle-middle where the small lateral movement does not reach the handle and the pitch sits over the fat part of the plate at fastball speed
  • Over-gripping the off-center position so tightly that arm speed drops and the velocity gap between the four-seamer and cutter becomes readable by timing-conscious hitters

In SwingVantage Motion Lab

SwingVantage overlays release point coordinates and wrist orientation across cutter and four-seam reps to verify that both pitches depart from the same spatial window. A grip-induced wrist turn is detectable in the forearm rotation data before the pitch is released. This gives pitchers early feedback on whether their cutter will arrive with the intended late-breaking profile.

Related guides & benchmarks

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