Pitching Rubber
Also known as: pitcher's plate, rubber
The pitching rubber is the white rubber slab on the pitcher's mound from which the pitcher must begin and complete a legal delivery. Leaving or dragging off the rubber incorrectly results in an illegal pitch.
A slow-pitch pitcher must have at least one foot on or touching the rubber when the pitch is released. The rubber anchors the delivery to a fixed distance from the plate, ensuring the arc and timing are consistent across all pitchers. It also defines illegal position violations — if both feet are completely off the rubber at release, the pitch is illegal. Good pitchers push off the rubber to generate forward momentum and arc consistency.
Example
The pitcher's back foot stays in contact with the rubber through the release, satisfying the umpire and establishing a legal delivery distance.
Related terms
- Legal DeliveryA legal delivery in slow-pitch softball is a pitch that is released underhand with a smooth, continuous motion and arrives within the required arc height — typically between 6 and 12 feet — over the plate.
- Pitching DistancePitching distance is the measured distance from the pitching rubber to home plate. In slow-pitch softball it is commonly 50 feet, though some leagues use 46 or 53 feet depending on age and division.
- Illegal PitchAn illegal pitch is any delivery that violates the rules — most commonly a pitch outside the legal arc window, a spin-thrown ball, or a release from an illegal position.
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