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Yatay Sapma

Also known as: kol tarafı kayma, eldiven tarafı kesme, yatay hareket

Definition

Yatay sapma, bir pitch'in spin'den kaynaklanan yanal hareketidir; inç cinsinden kol tarafına (pozitif) ya da eldiven tarafına (negatif) doğru ölçülür.

IVB gibi, yatay sapma da spinsiz bir topun sahip olacağı doğal kaymayı ayıkladıktan sonra ölçülür. Sinker'lar ve çift dikişliler pozitif (kol tarafı) yatay sapma taşır; cutter'lar ve slider'lar negatif (eldiven tarafı) sapma taşır. Yatay ve dikey hareketin birleşimi bir pitch'in şeklini tanımlar ve iyi tünelleyen pitch'leri eşleştirmek için kullanılır. Uç düzeyde yatay hareket edenler — 15 inçin üzerinde yatay sapmaya sahip süpüren slider'lar — takip verisi hareket profillerini eyleme geçirilebilir hale getirdikçe giderek daha öne çıktı.

Beginner tip

Learn to read your own horizontal break by pitching in front of a camera set up directly behind the pitcher and watching how far each pitch drifts laterally from the expected straight-line path to the catcher's glove.

Advanced note

Plot your arm-side and glove-side pitches on a movement chart and identify which pairs create the widest horizontal separation at the plate. This means those are your most effective two-pitch tunnels for maximising lateral stress on the hitter.

Example — Bir takip sistemi raporunda

Süpüren pitch'i 17 inçlik yatay sapma gösterdi ve vurucular bir fastball beklerken bir buçuk fit uzaklaşan bir pitch aldıklarında boşa sallamalar üretti.

How it shows up on video

Horizontal break is visible on video as lateral movement away from the expected straight-line trajectory. A sweeping slider's break is observable to the naked eye in the final 20 feet of flight. Common errors affecting horizontal break include a spin axis that is too vertical (converting horizontal break potential into IVB), uneven grip pressure that produces varying amounts of side-spin between reps. A shortened delivery that reduces the distance the ball travels and therefore the total movement accumulated before the plate.

Common mistakes

  • Confusing total spin rate with horizontal break potential. This means a pitch can have high RPM but poor horizontal break if the spin axis is oriented vertically rather than laterally
  • Locating an arm-side breaking pitch at the inner edge against same-handed hitters where the movement direction runs toward the plate rather than away from the swing path
  • Maximising horizontal break at the expense of vertical break. This produces a pitch that stays at one height and moves only laterally. This means giving hitters a predictable plane to hunt in the zone
  • Throwing high-horizontal-break pitches from uneven arm angles. This changes the movement direction and makes it impossible to locate the pitch reliably to the intended zone edge

In SwingVantage Motion Lab

SwingVantage measures lateral trajectory deviation across rep sequences and plots horizontal break magnitude on a pitch-shape chart alongside IVB. This gives pitchers a visual representation of their full movement profile. The system identifies whether horizontal break is stable across a session or drifting. This means which can indicate grip fatigue or mechanical uneven results in the wrist and forearm.

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