Introduction: soft ball sport was invented in 1887 in Chicago, America, it was developed from the game of baseball, however a softer ball is used bigger and the field is smaller Pitching is another difference between baseball and softball, in softball the pitcher throws under the arm while baseball is over the hand. The name softball was only developed in 1926, in the years leading up to 1926 many names were given to the game such as "ladies baseball", "kitten ball", "mush ball" and many others. There are two types of softball, slow fast pitch soft ball and fast pitch. Mechanical differences involving speed, position and technique, to name a few, are what distinguish these very similar types of softball. With pitching there are a number of rules that must be followed so that no foul balls are thrown. Step: When releasing the ball, a step must be taken (using the non-pivot foot) at the same time the ball is released. The step must occur in the momentum of the pitching movement. (while the ball is thrown it is necessary to take a step). The pitcher, however, may not step more than +/- 60 cm (24 inches) forward (must be inside the pitcher's plate). Another rule is that when the pitcher throws, one foot must remain on the ground at all times. If the pitcher moves both feet, dragging, jumping, any movement that causes both feet to leave the pitcher's plate, the ball will be illegal. Lift both feet off the ground when throwing (jumping is also illegal). The different throwing techniques: The main differences are in the technique used to throw the ball and the number of players on the field, both soft ball styles use the underhand throwing style. In a slow pitch softball, the ball measures 25.5 cm (12 inches) and must curve before... the center of the card... the th line. This movement is an easy, semicircular movement. As the pitcher brings his arm back, he places his body weight on the drive leg and steps forward with the drive leg as he releases the ball in front of his body. The pitch must begin with the pitcher's foot placed flat, the foot may only be removed from the plate when the ball is released. The throw must enter slowly, between 1.8 and 3.6 m above the ground, the wrist must not be snapped rapidly to obtain a coherent movement and a perceptible arc. The ball must be thrown inside the strike zone, which is between the batter's back shoulder and knees. After releasing the ball, the bowler's arm continues forward, with the hand ending at the top and the arm near the ear, this is known as a follow through. After the follow-through, several backward steps are performed for fielding.