When is a pitcher considered to be in the wind-up position?

A pitcher is considered to be in the wind-up position when his non-pivot foot is on or behind a line extending through the front edge of the pitcher's plate. This position allows the pitcher to begin his delivery to the batter without being restricted by the rules that apply to the set position.

In the wind-up position, the pitcher has the flexibility to perform a variety of motions, including stepping back and lifting his non-pivot foot, which can create momentum for his pitch. This distinction is vital because it impacts how a pitcher can legally deliver the ball, especially concerning balk rules and how baserunners can react. A pitcher in this position is not at risk of being called for a balk if he does not come to a complete stop.

The other options reference aspects of foot positioning and contact with the pitcher's plate but do not accurately define the wind-up position. For instance, raising the non-pivot foot or having the pivot foot off the ground can occur in various contexts, which doesn’t solely indicate the wind-up position. Additionally, having both feet in contact with the pitcher's plate actually refers to the set position, where the pitcher comes to a complete stop before delivering the pitch. Understanding these distinctions helps in recognizing the legality of a