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Traduction automatique. L’anglais fait référence ; nous affinerons la formulation au fil du temps. Une suggestion ? Dites-le-nous.

Beginner

Lancer illégal

Definition

Un lancer illégal est toute livraison qui enfreint les règles : le plus souvent un lancer hors de la fenêtre d’arc légale, une balle lancée avec effet ou un relâchement depuis une position illégale.

Les infractions courantes de lancer illégal au slow-pitch comprennent : un arc trop bas (sous 6 pieds / 1,8 m) ou trop haut (au-dessus de 12 pieds / 3,7 m) ; imprimer un effet intentionnel (tourner brusquement le poignet au relâchement) ; une livraison à deux mains ; ou lancer depuis l’extérieur du caoutchouc. Quand un lancer illégal est déclaré, le frappeur peut prendre le lancer comme une balle ou choisir de s’élancer. Les lanceurs apprennent à lire les tendances de l’arbitre et à ajuster leur arc pour rester légaux et protéger leur équipe des comptes offerts.

Beginner tip

If an umpire calls your pitch illegal, ask in particular which rule was violated. This means arc, speed, or release. This means. As a result, you can fix the correct issue rather than changing the wrong thing.

Advanced note

Film your practice pitches from the side with a reference marker at 6 and 12 feet to build a visual library of your arc heights across different speeds and effort levels.

Example

Le lancer monte à 14 pieds (4,3 m) — bien au-dessus du maximum — et l’arbitre signale immédiatement « lancer illégal », accordant une balle au frappeur.

How it shows up on video

An illegal pitch is identifiable on video by comparing the ball's peak height against a known reference. This means a flat delivery that never visibly rises above the batter's helmet is almost certainly below 6 feet. A spin-enhanced pitch shows rapid rotation visible as a visible seam blur or an unusual lateral curve that a standard arc would not produce. The umpire's call is definitive, but video review helps pitchers self-diagnose between games.

Common mistakes

  • Throwing too hard and flattening the arc below 6 feet in the excitement of a key at-bat, the most common illegal-pitch type in competitive slow-pitch
  • Adding wrist-snap to generate extra spin for movement, not realizing the association classifies intentional spin as an illegal pitch
  • Failing to come to a complete stop with both feet on the rubber before starting the delivery. This some associations classify as an illegal start position
  • Pitching from the wrong distance after moving to a different league, unknowingly using 46-foot mechanics from a 50-foot rubber or vice versa

In SwingVantage Motion Lab

SwingVantage can flag pitch deliveries where the estimated arc height falls below the 6-foot threshold from video analysis. This gives pitchers objective feedback to self-correct before a game situation.

Related guides & benchmarks

Put this into your swing

SwingVantage can spot this in your own swing — free to start.

See a sample Slow-Pitch Softball report first