Fast-pitch softball is a variant of softball where the pitcher throws the ball at high speeds, typically exceeding 60 miles per hour. The game is played on a diamond-shaped field with bases 60 feet apart. Teams consist of nine players, and the objective is to score runs by hitting the ball and running around the bases. In fast-pitch softball, the pitcher uses an underhand throwing motion, which is a key characteristic of the sport. The game is governed by rules set by organizations like the International Softball Federation and is popular in schools and competitive leagues, especially among women and girls.